5. Sleep—but not too much
Too little sleep (consistently under six hours a night) raises your risk of car accidents, diabetes, obesity, depression and heart disease, according to the U.S.-based National Sleep Foundation. But interestingly, some research suggests that too much sleep—over nine hours—is also associated with more illness, accidents and death. “We know from huge epidemiological studies and from our own research that people sleeping seven hours a night live longer than people sleeping eight,” says Buettner. But many of those seven-hour sleepers also take a brief afternoon nap—a habit Buettner says lowers heart attack risk by 30 percent.
Try this: Set a consistent bedtime. Program your alarm to go off seven hours later, weekends included. And when you can, take a 20-minute afternoon nap.