I think "It's Not How Good You Are, Its How Good You Want to Be" (http://www.amazon.com/Its-Not-How-Good-Want/dp/0714843377 http://www.amazon.com/Its-Not-How-Go

I think "It's Not How Good You Are, Its How Good You Want to Be" (http://www.amazon.com/Its-Not-How-Good-Want/dp/0714843377 http://www.amazon.com/Its-Not-How-Good-Want/dp/0714843377) is a good self-improvement book for lots of different people, entrepreneurs included.