There are several Mental Game guru's and there are even more books out there for the mental game aspect part of your game.
Here are a few books to check out...
"The Mental Game" by Tom Dorsel
http://www.amazon.com/Golf-Mental-Game-Tom-Dorsel/dp/1581826494
"Zen Golf" by Joseph Parent
http://www.amazon.com/Zen-Golf-Mastering-Mental-Game/dp/0385504462
"The mental keys to improve your golf" by Michael Anthony's
http://www.mentalkeys.com/