Eat a rainbow...
...made of vegetables. Their cancer-preventing abilities are unparalleled. Remember: Aim for nine servings of fruits and vegetables each day.
Sup from the sea
Don't just slap anything with fins onto your plate: You want fatty fish, such as salmon, sardines, and our deshi variety of carp. They contain the omega-3 fatty acids DHA and EPA, which many studies show help prevent sudden death from heart attack. Omega-3s may also help ward off depression, Alzheimer's disease, and age-related macular degeneration, a leading cause of blindness and maybe some cancers, although evidence is mixed.
To get more of the benefits of good fats, snack on an ounce (a handful) of walnuts a day. Use less corn oil, and more canola and olive oils, also avoid cookies, margarine, and snack foods such as chips, which are loaded with unhealthy trans fats.
Belt out a tune
Exposing yourself to music might help boost your immune system: a study showed that levels of an infection-fighting antibody called IgA increased 240% in the saliva of choral members performing Beethoven's Missa Solemnis.
Drink a cuppa
Studies (of mice, cells in lab dishes, and people) say tea may fight prostate and breast cancer and heart disease. Green is best, although black tea confers some benefits, too.
Whittle your waist
To determine if your body is staying young, the tape measure is better than the bathroom scale. Your weight can remain the same while you lose muscle and pack on fat, including visceral fat, the culprit behind a thick waist. It's linked to a heightened risk of age-related ills such as high blood pressure, diabetes, and heart disease. If your waist measures more than 35 inches (for a woman) or 40 inches (for a man), you probably have too much belly fat.
The best way to shed that inner load: exercise, brisk but not too arduous. 45 minutes of moderate-intensity aerobics three times a week and 20 minutes of moderate-intensity weight training, also three times weekly.