44. Get your ZZZ's.

Go to sleep a half-hour earlier one day this week. Adults need somewhere in the neighborhood of seven to eight hours sleep nightly (some may need more, some less). Adequate sleep is important to keep our nervous system in perky condition. Depriving yourself of rejuvenating slumber can feed into impaired memory and physical performance and, if continued, even mood swings. Hit the hay earlier so that you start each day refreshed and better motivated to eat right and exercise.

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Learn more about Boston University's Nutrition Programs.