BOOKS
The Mental Game of Baseball - H.A. Dorfman
       (any and ALL of Dorfman's works)
Wooden - John Wooden
Prescious Present - Spencer Johnson
The Inner Game of Tennis - W. Timothy Gallway
        (I don't even play tennis, but you'll get it)
The Double Goal Coach - Jim Thompson
Season of Life - Jeffrey Marx
Sacred Hoops - Phil Jackson

Other Websites
Rounding Third Blog (really good info & commentary)
Baseball Resource (what's happening & pulse of Southern California baseball)