Sugar

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Limit Sweets
Researchers are beginning to understand that excess sugar can modify essential proteins in our bodies, and the buildup of these abnormal proteins can contribute to everything from wrinkles to energy loss.

sunlight

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Go Outside
All your body needs to produce its required amount of vitamin D is ten to 15 minutes of sunlight three times a week. A study from the American Journal of Clinical Nutrition reported that women with higher levels of D have longer telomeres—the protective caps at the end of our chromosomes, which scientists consider an excellent marker of aging. The longer your telomeres, the "younger" your cells.

meditate

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Take Five
In a 2004 study, scientists found that the telomeres of women with the highest levels of stress appear at least a decade older, on average, than their low-stress-level counterparts. Remember to give yourself a break as often as you can—even if it's as simple as a self-massage, or closing your eyes and meditating for a few minutes.

walk

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Get Romantic
A study published in the BMJ (British Medical Journal) suggests that those who orgasm two times a week or more live longer than everyone else. Enough said.
Next: How to keep your metabolism up all day long