Losing teaches you how to win in a language that winning never speaks.

Winning tells you that something worked and nothing about which part. Everyone plays well, nobody examines anything, and the mistakes stay hidden inside the result. A loss opens all of it up: the gap in preparation, the decision made at the wrong moment, the thing you have been getting away with. It is a harsher teacher and a far more specific one.

After the next thing that does not go your way, give it a day, then spend ten minutes on what you would change rather than on how it felt. Write two lines. That is enough to turn a bad afternoon into something you can use.