Rodney

Wash your hands. A lot. Especially after being with kids. Especially after shaking hands with a lot of strangers, or otherwise passing objects back and forth between numerous people, or handling a lot of money. Especially after working with anything contaminated with anonymous substances. If you can't wash your hands right away, learn to avoid touching your face or mouth or eyes _until_ you've washed your hands.

You will avoid a fair number of colds and a certain number of gastrointestinal illnesses. Hard-won lesson for me.

Second: don't eat food that makes you feel bloated, sluggish, or otherwise bad afterwards. No matter how good it tastes. Your body is trying to tell you something; you may consider bloatedness, etc., a normal feeling, because of what you normally eat, but it's actually a sign that you're not eating things that your body can handle very well. This becomes more obvious past 25. Even if you don't have a particular nutrition regime, think about your body's reactions to the food you pick, and you won't go too far wrong.

Third, moderate exercise several times a day is better for overall fitness and weight loss than heavy exercise once a day.