The Master Key System - Charles F. Haanel
The Secret introduced me to the laws of attraction years ago, but The Master Key System taught me how to put the laws into motion. Having experienced "The Secret" firsthand, I wanted to learn how to harness this great power. The book is easy to follow with weekly exercises to strengthen your ability to concentrate, thus strengthening your ability to visualize your perfect world and witness the universe create the circumstances for you to achieve anything.
This should be taught in schools. I highly recommend.