This is a really crucial subject and at least 50% of Competition Success is due to mindset and mental preparation. I always wonder why people seem to dance around the subject of mental training and rarely talk about it. Yet anybody who's really successful uses mental training strategies along with a methodical physical regimen.

Here's a cool website resource, check it out. There's even a forum for Competitive Edge strategies/training.
http://www.thewinningmindset.com