Make Better Decisions with Mental Models

Most poor decisions fail at the framing stage, not the analysis stage. You can reason carefully about a badly framed problem and still reach a wrong conclusion. Mental models — well-defined thinking frameworks — address this by giving you a systematic process for approaching decisions rather than relying solely on intuition. The models in this plan are operational tools used by investors, scientists, and strategists because they produce better average outcomes, not because they're intellectually elegant.

The session covers five core frameworks: first-principles thinking (breaking assumptions down to components rather than reasoning by analogy), opportunity cost (explicitly accounting for what you're giving up with each choice), inversion (imagining failure to clarify what to avoid), second-order effects (thinking past the immediate consequence), and the pre-mortem (projecting forward to anticipated failure before committing). Each framework is practiced against a real decision you're currently facing, not a hypothetical scenario.

The decision journal is the long-term practice this session introduces. Tracking what you decided, why, what you predicted, and what actually happened builds calibration over time that self-assessment never can. Most people think they're better predictors than they are because they don't track their predictions. The journal creates feedback that reveals which biases show up consistently and which frameworks correct them. One session gives you the vocabulary; the journal turns it into judgment.