If you want to live to 100, leaving a little bit of food on your plate may be a good idea. Author Dan Buettner, who studies longevity around the world, found that the oldest Japanese people stop eating when they are feeling only about 80% full.
St. Louis University researchers have confirmed that eating less helps you age slower; in a 2008 study they found that limiting calories lowered production of T3, a thyroid hormone that slows metabolism—and speeds up the aging process.
Having satisfying sex two to three times per week can add as many as three years to your life. Getting busy can burn an impressive amount of calories—sometimes as much as running for 30 minutes. (Which would you rather do?)
Regular sex may also lower your blood pressure, improve your sleep, boost your immunity, and protect your heart.
Turn off the TV
Too much time in front of the boob tube can take a serious toll on your health. In fact, a 2010 study found that people who watched four or more hours a day were 46% more likely to die from any cause than people who watched less than two hours a day.
Even cutting back a little can help; each additional hour you watch increases your overall risk of dying by 11% and dying from heart disease by 18%.