The Decision-Maker's Toolkit

A focused path for people who need to make better decisions under uncertainty. Probability, bias awareness, and structured frameworks.

Every day you make decisions — some small, some life-changing. This path gives you the specific models that improve decision quality most reliably. Follow them in order; each builds on the last.

1

Probabilistic Thinking

Stop thinking in binary. Assign probabilities to outcomes. This is the foundation of every other decision model.

2

Confirmation Bias

The single most dangerous bias in decision-making. You must understand it to counteract it.

3

Opportunity Cost

The true cost of anything is what you give up. Every yes is an implicit no to something else.

4

Second-Order Thinking

Think one step further. The best decisions come from asking "and then what?" before committing.

5

Sunk Cost Fallacy

Past investments are gone. Only future value matters. This one model prevents more bad decisions than almost any other.

6

Inversion

Before deciding what to do, figure out what would guarantee failure — then avoid those things.

7

Pre-Mortem

Imagine your decision has already failed. Work backwards to find the risks you haven't considered.

8

Regret Minimization

Project yourself to age 80. Which choice will you regret not taking? Bezos used this for the biggest decision of his career.

Practice with the tools

After working through this path, put it into practice: