Learn from your defeats.
Disappointment and failure build character and patience, when allowed to do so. They can teach you to win and lose with grace, an increasingly lost art these days. Romans 5:3-4 says it like this: "We can rejoice, too, when we run into problems and trials, for we know that they are good for us—they help us learn to endure. And endurance develops strength of character . . . " Inner spiritual strength, the kind resulting from sincere faith in God, helps cultivate that attitude.
Culled from http://www.cbn.com/spirituallife/biblestudyandtheology/discipleship/wright_disappointment.aspx