Unlock the power of the songs in your pocket Maybe you blast the speakers when you need to get pumped up. If that's all you do, though, you're not taking full advantage of the way music can help you. Listen to a slower track first and the one-two punch of the playlist can push you even higher. Overflowing with easy-to-use tips like these, Your Playlist Can Change Your Life is the first book to offer scientifically proven methods for using your favorite...