• Start by being your own best friend. People with a strong, positive emotional style get fewer colds than grumps. According to Carnegie Mellon University, people who are moody, nervous, or easily stressed have weaker immune systems. If that's you, here's a quick psychological trick to turn your mindset around: Fold a piece of paper in half. On one side, write down your negative thoughts. On the other, write down what you would tell a friend if they came to you with those worries. Now use that advice you just gave yourself.
  • Another way to stay healthy: Writing therapy. Dr. James Pennebaker, psychology professor at the University of Texas says people who consistently write down their feelings have better immune function. But you need to keep doing it. Write down past traumas, current problems, and other irritations. You start understanding yourself better and moving past your problems. The reduction in stress is what boosts your protective anti-bodies.
  • Another thing that can rock your body in a bad way: a bad marriage. And women are affected by this physically more than men are. If a woman is fighting with her spouse, she's more prone to sickness   all kinds of sickness. So de-stress your love life by blowing off steam instead of blowing up at each other. If things are coming to head   take a time out and go to the gym, or go for a run. Anything physical will derail your stress response.
  • One last way to stay healthy   turn off violence. Don't watch TV programs that have violence, the news, or even surgery shows   especially at night. They can increase your risk of depression and weaken your immune system. Watch the funny stuff at night   sitcoms, even reality TV. It's proven that reality TV makes us feel better about ourselves because we're not stuck in those ridiculous situations. So watch some Fear Factor and feel good because you're not eating a hissing cockroach.