Sleep in

Sleep in: +2 years - the average American is almost an hour short on sleep, which hinders the repair of many cells in the body. Try to get your 7 to 8 hours a night.

Have sex: +3 to 5 years - intercourse helps you live longer by relieving stress and releasing feel-good hormones like oxytocin. You'll also burn about 200 calories.

More from Health.com: 9 ways to live longer

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