I know of executives and investors who keep a “decision journal” in which they record the major decisions they make each week, why they made them, and what they expect the outcome to be. They review their choices at the end of each month or year to see where they were correct and where they went wrong.

Experience taught me how invaluable it is to reflect on and write down my decision-making criteria whenever I made a decision, so I got in the habit of doing that.