It's not just that we need to set more flexible goals. We ourselves also need to be more flexible in the way we evaluate success and failure. - Annie Duke

In fact, losing feels about two times as bad to us as winning feels good to us.

Success does not lie in sticking to things. It lies in picking the right thing to stick to and quitting the rest.

Chapter 6 offers up strategies to improve decisions about when to quit, including the importance of tackling the hardest part of a project first, as well as ways to develop benchmarks, criteria, and signals, called kill criteria, that will help ensure you quit sooner when persisting is no longer in your best interest.