I really like that this book provides some short lists of actions to take to improve the way I think about things. The lists include items to help improve your success through interaction with other people, managing your own thoughts, moving your self toward being action oriented, and more. I'm planning to keep my copy as a reference and potentially even create study cards of some of the lists.
Also, if you're in a hurry, each chapter has a summary of the main points and actions at the end. You could just read those and refer to the chapter if you need additional information to understand the point.