A really nice one is the unabridged audiobook version of this. "No Excuses!: The Power of Self-Discipline for Success in Your Life" by Brian Tracy. I generally prefer audiobooks read by the authors themselves.

"The Five Elements of Effective Thinking" is also a great audiobook. It summarises effective thinking through lots of easy to understand examples. You can make a moron listen to this & he will definitely grow some brain cells listening to it. Happened to me already. :D