Deciding how much sleep you need means considering your overall health, daily activities, and typical sleep patterns. Some questions that you help assess your individual sleep needs include:

• Are you productive, healthy, and happy on seven hours of sleep? Or have you noticed that you require more hours of sleep to get into high gear?
• Do you have coexisting health issues? Are you at higher risk for any disease?
• Do you have a high level of daily energy expenditure? Do you frequently play sports or work in a labor-intensive job?
• Do your daily activities require alertness to do them safely? Do you drive every day and/or operate heavy machinery? Do you ever feel sleepy when doing these activities?
• Are you experiencing or do you have a history of sleeping problems?
• Do you depend on caffeine to get you through the day?
• When you have an open schedule, do you sleep more than you do on a typical workday?

Start with the above-mentioned recommendations and then use your answers to these questions to home in on your optimal amount of sleep.