The 7 Habits of Highly Effective People by Stephen R. Covey

This isn't a quick-tips-start-tomorrow kind of book. The concepts are sometimes intricate], and you'll want to study this book, not skim it. When you finish, you'll probably have Post-it notes or hand-written annotations in every chapter, and you'll feel like you've taken a powerful seminar by Covey. --Joan Price 

Before you can adopt the seven habits, you'll need to accomplish what Covey calls a "paradigm shift"--a change in perception and interpretation of how the world works. Covey takes you through this change, which affects how you perceive and act regarding productivity, time management, positive thinking, developing your "proactive muscles" (acting with initiative rather than reacting), and much more