I never hit a shot, not even in practice, without having a very sharp, in-focus picture of it in my head.
Focus on remedies, not faults.
My ability to concentrate and work toward that goal has been my greatest asset.
It's great to win, but it's also great fun just to be in the thick of any truly well and hard fought contest against opponents you respect, whatever the outcome.
Temper is the one thing you can't get rid of by losing it.