Here are a few of mine... I like so many its hard for me to put them in order..
1. 5 major pieces to the life puzzle by Jim Rohn
2. The Psychology of Success by Denis Waitley
3. Awaken The Giant Within by Tony Robbins
4. The Science of Being Great by Wallace Wattles
5. As A Man Thinketh by James Allen
6. Maximum Achievement by Brian Tracy
7. Think and Grow Rich by Napoleon Hill
8. The Magic of Thinking Big by David Schwartz
9. The Psychology of Winning by Denis Waitley
10. The Angel Inside by Chris Widener
By the way, if anyone knows of any good IM books please send me a PM..