As the most active time for our brains and the most important element to a calmer, happier life, sleep has become a major health issue for millions of people. Packed with fascinating facts and anecdotes, this guide includes tips on how to make your room sleep-friendly, how to select a soundtrack to doze off to, and how to use sleeping to improve your daytime learning. Even if you don't have issues with insomnia, Michael Acton Smith shows how you can get more out of that "lost" time by getting to know your own subconscious through a sleep journal and exploring lucid dreaming.