A necessary part of becoming a better decision-maker is learning from experience. Experience contains the lessons for improving future decisions. Res… - Annie Duke

Essentially, regardless of the history they have with the decision, they ask themselves, "If I were approaching this decision fresh, would I want to enter into this course of action?"

Outcomes don't tell us what's our fault and what isn't, what we should take credit for and what we shouldn't. Unlike in chess, we can't simply work backward from the quality of the outcome to determine the quality of our beliefs or decisions. This makes learning from outcomes a pretty haphazard process.

The decision you make determines which set of outcomes are possible and how likely each of those outcomes is. But it doesn't determine which of that set of outcomes will actually happen.