For me, the most effective way to learn combines learning from the experience of losing or disappointment with the confidence gained from winning games and being successful.
Primarily, confidence from winning opens the door to the character of a person.
Losing is a catalyst for you to look at and ask yourself, what do I need to do to improve?
Unfortunately, sometimes the loser looks to blame others for their failure and carries on the same path of disappointment; lowering their sights after each failure until success eventually arrives.
However, the committed seek improvement until success is achieved, no matter how long it takes. We love to have these people in our team as they inspire us to want to succeed as well.