
7. The One Thing by Gary Keller
If you live in the United States, you have most likely seen signs in your town for Keller Williams Realty, because it is one of the biggest real estate companies in the world. Its founder, Gary Keller, distills his secrets to success in his book, The One Thing: The Surprisingly Simple Truth Behind Extraordinary Results. One of the main principles of the book is that in order to be the best at anything, you should focus on just one thing, because if you spread yourself too thin, there will never be enough time to master whatever it is will bring you success.