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Nap Time: Prime nap time is from 1:00 p.m. to 3:00 p.m. Darkness: Use a face mask or eye pillow to provide daytime darkness and make your nap more effective. Not Too Late: Napping within three hours of bedtime may interfere with nighttime sleep. Quiet Place: Assure that you will not be disturbed for the duration of your nap. 30-Minute Maximum: When taking a nap longer than 30 minutes, you run the risk of heading into deep sleep, which will leave you feeling tired and groggy. Set an Alarm: You will eventually train yourself to nap for the amount of time you set aside. Until then, set an alarm or ask someone to wake you up. The Caffeine Nap: Some people claim that drinking coffee and then taking an immediate nap works well.via about.com