so you can live a longer, healthier life. You will need daily moderate exercise, something

to laugh about, optimism, lots of friends, a healthy diet, seven to nine hours of sleep

per night, optional a bridge group. Step 1. Get moving: Just 30 minutes a day of moderate

exercise will do. You can even split it into three 10-minute bursts of activity. Step 2.

Find something to laugh about every day – even force it if you have to. Real or fake,

laughter strengthens your immune system by increasing good-for-you hormones and reducing stress ones;

lowering your blood pressure; and slowing your resting heart rate. Step 3. Train yourself

to look at the bright side. Optimistic people were two and a half times less likely to develop

cancer of any kind than their pessimistic peers, according to one study. Step 4. Make

time for the friends you have and cultivate new ones. A study found that seniors with

a lot of pals were 22 percent less likely than their less social counterparts to die

during the decade when they participated in the study. Start a bridge group. Research

shows that bridge boosts the body's defense against infections and illness. Step 5. Eat

a healthy diet: at least five servings of fruits and vegetables a day focusing on the

antioxidant powerhouses; complex carbs, fatty fish, and a few cups of green tea at least

two times a week; a daily handful of nuts; no more than one glass of alcohol per day;

and a limited amount of meat and sweets. Eat more mushrooms during cold and flu season:

Research shows that when a virus is present, mushrooms may rally the immune system to fight

them. Step 6. Get at least seven hours of sleep every night, more if you can. Did you

know, the first scientists to prove that the body defends itself against disease through

the immune system shared the Nobel Prize in 1908.