Think and grow rich is Ok. It's limited in is application (At least for me). My ALL TIME favorite book is.. Og Mandino's - The Greatest Salesman in the world. It focuses on your daily habits and mindset. I've been reading the book just about everyday for the past 3 years. (I can't believe I let that book sit on my book shelf for 4 years before I picked it up... Major Bummer). If you haven't checked it out, I strongly consider reading it. It's a very simple read but it's VERY strong.