Abide in Jesus, the sinless One - which means, give up all of self and its life, and dwell in God's will and rest in His strength. This is what brings the power that does not commit sin.
A believer may pass through much affliction, and yet secure very little blessing from it all. Abiding in Christ is the secret of securing all that the Father meant the chastisement to bring us.
I used to think that losing made you more hungry and determined but after my success at the Olympics and the U.S. Open I realise that winning is the biggest motivation.
It's hard because you want to be able to just, okay, focus your energy on trying to win the match, but you need to then have tactics as to how you're going to deal with how you're feeling.
I guess the closest I came was doing chores around the house to earn pocket money. My brother and I would have to do the washing up, cleaning around the house, walking my grandparents' dog, lots of things. We didn't get a huge amount but it was always enough to be able to walk down to the local shops and get some sweets.