It's amazing what we can do if we "psych" ourselves up (or out) sufficiently. Sports psychology is the topic of a number of books in our collection including Terry Orlick's In Pursuit of Excellence: How to Win in Sport and Life through Mental Training [796 ORL] and Thinking Body, Dancing Mind: TaoSports for Extraordinary Performance in Athletics, Business, and Life by Al Chung-liang Huang [796 HUA].
Here's an article on the subject with the intriguing title, "Psychology of Sport: How a Red Dot Swung It for Open Champion." Red dot?
Speaking of dots...there's a picture book for kids, The Dot by Peter Reynolds [JP REY] that deals in a round about way with psychology for kids!