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Quick Reference Cheat Sheet

Every mental model, decision framework, and strategic tool on Saker Advantage -- in one scannable, printable page.

Updated April 2026

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1. Thinking Models 8 2. Decision Frameworks 5 3. Cognitive Biases 7 4. Strategy Models 5 5. Leadership & Communication 4 6. Productivity & Habits 5 7. Systems & Risk 5

This page covers 39 frameworks across 7 categories. Each card gives you the one-line definition, when to reach for it, the most common mistake people make when applying it, and a link to the full guide. Bookmark it, print it, or pin it next to your desk.

1 Thinking Models

First Principles Thinking

Break a problem down to its most fundamental truths and reason upward from there, rather than reasoning by analogy or convention.

Use when: Existing solutions feel wrong, costs seem artificially high, or you are entering a new domain where conventional wisdom may not apply.
Common mistake: Skipping the decomposition step and simply brainstorming -- you end up with creative analogies, not foundational insights.
Full guide

Inversion

Instead of asking "How do I succeed?", ask "What would guarantee failure?" -- then avoid those things systematically.

Use when: You are stuck on a problem, planning a project launch, or trying to identify hidden risks before committing resources.
Common mistake: Stopping at the inversion step without flipping the answers back into actionable positive steps.
Full guide

Second-Order Thinking

Consider not just the immediate consequence of a decision, but the consequences of those consequences -- and the consequences after that.

Use when: Making policy decisions, pricing changes, incentive structures, or any action whose ripple effects matter more than the direct effect.
Common mistake: Analysing only one step ahead and declaring it "strategic thinking" -- the real value is in the second and third-order effects.
Full guide

Map vs Territory

The map (your model of reality) is never reality itself. All models are simplifications -- useful, but never complete.

Use when: You catch yourself over-relying on spreadsheets, frameworks, or plans while ignoring messy real-world signals.
Common mistake: Confusing the model's precision with accuracy -- a detailed financial forecast is still a guess, no matter how many decimal places it has.
Full guide

Occam's Razor

Among competing explanations, the simplest one -- the one with the fewest assumptions -- is most likely correct.

Use when: Diagnosing problems, debugging systems, evaluating conspiracy theories, or choosing between competing hypotheses.
Common mistake: Using it to dismiss complex but correct explanations. Simplicity is a tiebreaker, not an absolute rule.
Full guide

Hanlon's Razor

Never attribute to malice that which is adequately explained by incompetence, ignorance, or misaligned incentives.

Use when: A colleague, partner, or competitor does something that seems hostile or sabotaging. Check for simpler explanations first.
Common mistake: Taking it too far and ignoring genuine bad actors. It is a starting hypothesis, not a guarantee of good intentions.
Full guide

Probabilistic Thinking

Replace binary yes/no predictions with probability estimates. Think in likelihoods, ranges, and expected values rather than certainties.

Use when: Making forecasts, evaluating risks, weighing bets, or any decision where uncertainty is the core challenge.
Common mistake: Assigning fake precision (e.g., "73.2% chance") without calibrating -- track your predictions to improve over time.
Full guide

Circle of Competence

Know the boundaries of what you truly understand. Operate inside your circle and be honest about where it ends.

Use when: Making investment decisions, choosing projects, hiring, or evaluating whether you can credibly assess a new domain.
Common mistake: Treating past success in one field as evidence of competence in another -- expertise rarely transfers as cleanly as ego suggests.
Full guide

2 Decision Frameworks

Pre-Mortem

Before executing, imagine the decision has already failed. Work backward to identify what went wrong -- then mitigate those risks now.

Use when: Launching a product, entering a partnership, making a major hire, or committing significant budget to a new initiative.
Common mistake: Running the exercise in a group setting where seniority suppresses honest risk-naming. Have people write risks independently first.
Full guide

10/10/10 Analysis

Ask: How will I feel about this decision in 10 minutes, 10 months, and 10 years? Separates short-term emotion from long-term consequence.

Use when: Emotional decisions -- leaving a job, confronting a partner, taking a public risk, or avoiding a difficult conversation.
Common mistake: Over-weighting the 10-minute feeling. The entire point is that the 10-month and 10-year perspectives should dominate.
Full guide

Regret Minimization

Project yourself to age 80 and ask: "Will I regret not having tried this?" Optimise for minimising lifetime regret, not short-term comfort.

Use when: Facing a major life or career fork -- starting a company, relocating, changing industries, or taking a big creative risk.
Common mistake: Applying it to small reversible decisions where it creates unnecessary drama. Best reserved for genuine one-way doors.
Full guide

Type 1 vs Type 2 Decisions

Type 1 decisions are irreversible (one-way doors) -- go slow. Type 2 decisions are reversible (two-way doors) -- go fast and iterate.

Use when: Deciding how much analysis a decision deserves. Most organisational slowness comes from treating reversible decisions as irreversible.
Common mistake: Defaulting every decision to Type 1 process (committee review, consensus). Most decisions are Type 2 -- decide with 70% confidence and correct later.
Full guide

Decision Journal

Record important decisions at the time you make them -- your reasoning, expectations, confidence, and tripwires -- before you know the outcome.

Use when: Any significant decision where you want to learn from the process, not just the result. Essential for defeating hindsight bias.
Common mistake: Only journaling outcomes, not reasoning. The value is in capturing what you thought and why, so you can evaluate the quality of your thinking over time.
Full guide

3 Cognitive Biases

Confirmation Bias

The tendency to search for, interpret, and remember information that confirms what you already believe, while ignoring contradictory evidence.

Use when: You notice you are only reading sources that agree with you, or only remembering data that supports your thesis.
Common mistake: Thinking awareness alone is enough. You must actively seek disconfirming evidence -- assign someone to argue the opposite case.
Full guide

Survivorship Bias

Focusing on the winners that made it through a selection process while overlooking the far larger number that did not, leading to false conclusions.

Use when: Studying success stories, evaluating investment track records, or drawing lessons from "best practices" case studies.
Common mistake: Reading a founder's autobiography and copying their strategy without asking how many founders did the exact same things and failed.
Full guide

Anchoring Bias

Over-relying on the first piece of information you receive (the "anchor") when making subsequent judgements, even if the anchor is arbitrary.

Use when: Negotiating, pricing, budgeting, or any situation where an initial number sets the frame for all further discussion.
Common mistake: Letting the other party set the anchor in a negotiation. Whoever speaks first often defines the range.
Full guide

Sunk Cost Fallacy

Continuing to invest in something because of past investment (time, money, effort) rather than evaluating future value on its own merits.

Use when: You hear yourself saying "But we've already spent so much on this" as a reason to continue rather than evaluating the path forward independently.
Common mistake: Framing quitting as "waste." The money is already gone. The only question is: starting from today, is this the best use of future resources?
Full guide

Dunning-Kruger Effect

People with limited knowledge in a domain tend to overestimate their competence, while experts tend to underestimate theirs.

Use when: Assessing your own expertise before making high-stakes decisions, hiring, or entering unfamiliar markets.
Common mistake: Using it only to judge others. The most important application is recognising when you yourself are on the "Mount Stupid" part of the curve.
Full guide

Loss Aversion

The pain of losing something is psychologically roughly twice as powerful as the pleasure of gaining the same thing.

Use when: Evaluating why you are holding a losing position, avoiding necessary change, or framing offers and proposals for others.
Common mistake: Letting the fear of loss prevent you from taking asymmetric bets where the upside far outweighs the downside.
Full guide

Availability Heuristic

Judging the likelihood of events by how easily examples come to mind -- vivid or recent events feel far more probable than they actually are.

Use when: You are making risk assessments after a dramatic news event, or when a recent anecdote is driving a strategic decision.
Common mistake: Letting a single vivid failure story override base-rate statistics. Always ask: "What does the data actually say, separate from this story?"
Full guide

4 Strategy Models

Porter's Five Forces

Analyse industry attractiveness through five competitive forces: rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants.

Use when: Evaluating whether to enter an industry, assessing competitive dynamics, or understanding why margins are compressed in a sector.
Common mistake: Running the analysis once and treating it as static. Competitive forces shift constantly -- revisit when market conditions change.
Full guide

SWOT Analysis

Map your Strengths, Weaknesses, Opportunities, and Threats in a 2x2 grid to clarify strategic position and prioritise action.

Use when: Starting strategic planning, evaluating a new venture, or preparing for a board meeting that needs a structured overview.
Common mistake: Listing items without prioritising or linking them. The power is in the cross-analysis: how can strengths exploit opportunities? How do weaknesses amplify threats?
Full guide

Blue Ocean Strategy

Instead of competing in crowded markets (red oceans), create uncontested market space (blue oceans) by making the competition irrelevant.

Use when: Your market is commoditised, margins are shrinking, and differentiation on existing dimensions has been exhausted.
Common mistake: Assuming blue ocean means "no competitors." It means redefining the value curve so existing competitors are not your benchmark.
Full guide

Asymmetric Upside

Seek bets where the potential upside vastly outweighs the downside -- where you can risk a little to gain a lot.

Use when: Evaluating investments, career moves, product bets, or any decision where you can structure outcomes to be convex (limited downside, unlimited upside).
Common mistake: Confusing asymmetric upside with recklessness. The key is that the downside must be survivable and bounded, even if the upside is unbounded.
Full guide

Competitive Moats

Durable competitive advantages that protect a business from competitors -- network effects, switching costs, brand, scale, or proprietary technology.

Use when: Evaluating long-term business viability, planning product strategy, or assessing whether a company's advantage is defensible or temporary.
Common mistake: Claiming a moat without evidence. Being first to market is not a moat. Having a good product is not a moat. A moat is structural and gets stronger with time.
Full guide

5 Leadership & Communication

Commander's Intent

Communicate the desired end state clearly so that people can make autonomous decisions when the plan inevitably breaks down.

Use when: Delegating complex work, managing remote teams, or setting strategy where you cannot control every execution detail.
Common mistake: Providing a plan without intent. Plans change; if your team understands the "why" and the desired end state, they can adapt. Without it, they freeze.
Full guide

The 85% Rule

Peak performance comes at about 85% of maximum effort -- pushing to 100% introduces tension and errors that reduce total output.

Use when: Managing team workload, setting personal pace, or designing training and development programmes.
Common mistake: Using it as an excuse for mediocrity. The 85% rule is about sustainable intensity, not about doing less. You should still be working hard -- just not at redline.
Full guide

Active Listening

Fully concentrate on what is being said rather than passively hearing -- reflect, clarify, and validate before responding.

Use when: Negotiations, one-on-ones, conflict resolution, customer discovery, or any conversation where understanding the other person is more important than being understood.
Common mistake: Waiting for your turn to talk while appearing to listen. True active listening means being willing to change your position based on what you hear.
Full guide

Cialdini's 6 Principles of Influence

Six psychological levers that drive compliance: Reciprocity, Commitment/Consistency, Social Proof, Authority, Liking, and Scarcity.

Use when: Crafting pitches, writing copy, designing onboarding flows, negotiating, or building buy-in for a new initiative.
Common mistake: Using all six at once, which feels manipulative. Choose the one or two most relevant to the context and apply them authentically.
Full guide

6 Productivity & Habits

Eisenhower Matrix

Categorise tasks on two axes -- urgent vs not urgent, important vs not important -- to decide what to do, schedule, delegate, or eliminate.

Use when: Your to-do list is overwhelming, you feel busy but unproductive, or you need to ruthlessly prioritise a week's work.
Common mistake: Spending all your time in the "urgent + important" quadrant. The highest-leverage work lives in "important + not urgent" -- schedule it or it never happens.
Full guide

Parkinson's Law

Work expands to fill the time available for its completion. Give yourself less time and you will find ways to be more efficient.

Use when: Setting deadlines, scoping projects, or noticing that a task is taking far longer than it should.
Common mistake: Setting unrealistically tight deadlines that produce low-quality work. The goal is to compress padding, not eliminate necessary thinking time.
Full guide

Habit Loop

Every habit follows a loop: Cue (trigger), Routine (the behaviour), Reward (the payoff). Change any element to build or break habits.

Use when: Building new habits, breaking bad ones, designing products that drive repeat engagement, or understanding your own automatic behaviours.
Common mistake: Focusing only on willpower to change the routine while ignoring the cue and reward. Redesign the environment and the reward structure first.
Full guide

Two-Minute Rule

If a task takes less than two minutes to complete, do it immediately rather than adding it to a list or scheduling it for later.

Use when: Processing email, clearing small administrative tasks, or in daily workflow to prevent trivial items from accumulating into a mountain of backlog.
Common mistake: Letting "quick tasks" hijack your deep work blocks. The Two-Minute Rule is for processing time, not for interrupting focused creative or analytical work.
Full guide

Deep Work

Professional activities performed in a state of distraction-free concentration that push your cognitive capabilities to their limit and create real value.

Use when: You need to produce high-quality output -- writing, coding, strategy, analysis -- and keep getting interrupted or diffused by shallow tasks.
Common mistake: Scheduling deep work but not defending it. Block 2-4 hours, close Slack, silence notifications, and treat it as non-negotiable as a meeting with your CEO.
Full guide

7 Systems & Risk

Feedback Loops

Systems where outputs circle back as inputs. Positive loops amplify change (growth or collapse); negative loops stabilise toward equilibrium.

Use when: Diagnosing why growth is accelerating or decelerating, understanding market bubbles, or designing systems that self-correct.
Common mistake: Ignoring delay. Feedback loops rarely have instant effects -- the lag between action and consequence causes people to overshoot or undershoot.
Full guide

Leverage Points

Places within a complex system where a small shift can produce large changes in everything else -- the highest-impact intervention points.

Use when: Trying to change a large system (organisation, market, product ecosystem) and you have limited resources to invest.
Common mistake: Intervening at low-leverage points (tweaking parameters) instead of high-leverage ones (changing the system's goals, rules, or information flows).
Full guide

Antifragility

Some things benefit from shocks and volatility. Beyond resilient (which resists damage), antifragile systems actually get stronger from disorder.

Use when: Designing systems, portfolios, or careers that need to thrive in uncertainty rather than merely survive it.
Common mistake: Confusing robustness with antifragility. A robust system endures shocks unchanged; an antifragile system uses shocks as fuel for improvement.
Full guide

Black Swan

Rare, unpredictable, high-impact events that are rationalised in hindsight as if they were predictable. You cannot forecast them -- but you can prepare.

Use when: Building risk management frameworks, stress-testing plans, or evaluating whether your strategy is fragile to tail events.
Common mistake: Trying to predict specific Black Swans. The point is that they are unpredictable. Instead, build systems that can withstand or benefit from any extreme event.
Full guide

Margin of Safety

Build a buffer between your estimate and your commitment. Only proceed when the gap between expected value and breakeven is wide enough to absorb errors.

Use when: Making financial commitments, setting project timelines, sizing teams, or any estimate-driven decision where being wrong has real cost.
Common mistake: Planning to best-case estimates. If your plan only works when everything goes right, your plan is fragile. Build in 20-30% buffer as a default.
Full guide

How to Use This Page

This quick reference is designed to be scanned, not studied. When you face a specific decision or problem, scan the cards to find the 2-3 frameworks most relevant to your situation. Then click through to the full guide for deeper instruction. Print this page and keep it on your desk, or bookmark it for fast retrieval. The goal is not to apply every framework every time -- it is to have the right tool available when you need it.

The Meta-Principle

Frameworks are tools, not rules. No single model captures all of reality. Use multiple frameworks on important problems to see them from different angles. When two frameworks give you conflicting answers, that tension itself is valuable information -- it tells you that the situation is more complex than a single lens can capture, and that you need to think more carefully about which aspects matter most in your specific context.

Related Guides

Mental Models

The complete guide to better thinking tools

Decision Making

Frameworks for better choices under uncertainty

Cognitive Biases

30 biases that sabotage decisions and how to overcome them

Strategy

Competitive strategy, moats, and positioning

Systems Thinking

Feedback loops, leverage points, and emergent behaviour