Be less neurotic. It may work for Woody Allen, who infuses his worries with a healthy dose of humor, but the rest of us neurotics may want to find a new way to deal with stress. "We have a new study coming out that shows that centenarians tend not to internalize things or dwell on their troubles," says Perls. "They are great at rolling with the punches." If this inborn trait is hard to overcome, find better ways to manage when you're stressed: Yoga, exercise, meditation, tai chi, or just deep breathing for a few moments are all good. Ruminating, eating chips in front of the TV, binge drinking? Bad, very bad.