Apply Second-Order Thinking to Any Decision
Go beyond 'what happens next' to predict the downstream consequences most people miss
Document decisions BEFORE outcomes, then review to separate luck from skill.
You are a decision scientist who designs decision journals for executives, investors, and professionals. Create a decision journal system and help me document a current decision. My decision: [DESCRIBE THE DECISION] Stakes: [LOW / MEDIUM / HIGH / LIFE-CHANGING] Deadline: [WHEN MUST YOU DECIDE?] Reversibility: [EASILY REVERSIBLE / PARTIALLY / IRREVERSIBLE] Create: 1. DECISION ENTRY (fill BEFORE deciding): - Date, mental state, all realistic options - For each option: expected outcome, probability, best/worst case, biggest fear - "What would I advise a friend?" - Cost of being wrong, what would change your mind 2. COGNITIVE BIAS CHECK: □ Sunk cost, □ Confirmation bias, □ Status quo, □ Social proof, □ Recency, □ Loss aversion For each checked: how it's distorting this decision 3. PRE-MORTEM — 6 months later this was a disaster. What went wrong? 4. DECISION RECORD — What you chose, why, confidence level, review date 5. REVIEW TEMPLATE — What happened, prediction accuracy, luck vs reasoning, lessons 6. JOURNAL SYSTEM — Tool, trigger, monthly review ritual
DECISION: 'Should I leave my job to freelance?' BIAS CHECK: ☑ Status quo — Am I staying because it's good, or because change is scary? ☑ Social proof — Friends went freelance and post highlight reels. PRE-MORTEM: 'Failed because I underestimated client pipeline time.' FRIEND ADVICE: 'Don't quit until you have 3 months runway AND 2 paying clients.'
This prompt implements the decision journal practice advocated by Annie Duke (Thinking in Bets) and Shane Parrish (Farnam Street) — one of the few proven methods for improving decision quality over time. It works by separating the quality of a decision from its outcome, capturing your reasoning at the point of decision before you know the result. This prevents outcome bias — the tendency to judge past decisions by what happened rather than what you knew at the time. The AI serves as a structured interviewer, prompting you to articulate your assumptions, alternatives considered, confidence level, and what would change your mind. Over time, this practice reveals systematic biases in your decision-making that are invisible in the moment.
Use before making any significant decision — career moves, large purchases, strategic bets, hiring choices, or project pivots. Essential when you notice a pattern of regret about past decisions and want to break the cycle. Perfect for leaders who make 10+ consequential decisions per week and need to track their reasoning. Ideal during uncertain situations where you're deciding under ambiguity and want a record of your thinking. Also valuable for quarterly reviews — comparing predictions to outcomes reveals calibration patterns.
The AI produces a structured decision record with: the decision statement, context and constraints, alternatives considered, your chosen option with rationale, confidence level, key assumptions, what would change your mind, and a review date. Expect a format designed for future comparison — when you revisit in 3-6 months, you can evaluate your reasoning process independently of the outcome.
Go beyond 'what happens next' to predict the downstream consequences most people miss
Identify cognitive biases affecting your decisions with debiasing techniques.
Imagine your project already failed — then work backward to find the causes and prevent them now
Weigh your options with a simple decision matrix when you're stuck between choices.
Your entire day, distilled into clean bullet points.