Book excerpt: Night shift is a difficult time to work. Do you work at night and feel tired all the time? Would you like to feel energetic at work, and think more clearly? Would you like to get better sleep? Would you like to avoid the groggy feelings that many night shift workers face? Would you like to have a normal appetite again? And be happier and less irritable? Dr. Steve Frei has been a night-shift-working emergency physician for over 30 years. Here is his practical guide to help you adapt to night shift in a scientifically based way. It answers your most difficult night shift questions: When should I sleep? How do I get to sleep easier? When can I exercise? Should I take sleeping pills? What can I do to stay awake and alert at work? Should I drink a lot of coffee? What about naps? Get the benefits of the newest research on circadian rhythms and shift work, sound sleep, light treatments, melatonin, napping, diet, caffeine, exercise, medications, and much more.