Do some prep work. "From a very young age, I would visualize good things, bad things, races going the way I wanted, races not going the way I wanted. I went through every race before I swam to prepare myself for anything that could happen. So whether I get disqualified or my goggles fill up with water -- I'm ready for anything."
Learn from your mistakes. "My disappointments probably helped me more than winning. I don't like to lose, so if I do have a failure, then I say to myself, 'What can I do to make sure that doesn't happen again?'"
Stick with it. "As easy as it sounds, it's the dead truth: Never give up! Nothing in life will ever, ever come easy, and there will always be obstacles that stand in your way."