Here are a few ways to get sick:

Smoke or chew tobacco;  don't exercise; eat lots of junk food and fat; drink high volumes of alcohol;  have a lot of unprotected sex with multiple partners;  ignore that spot on your skin, it'll go away;  feel guilty about everything and keep it inside;  avoid people and your family;  abandon fun, laughter and vacations;  get a job you hate and keep at it;  don't wash your hands;  get as little sleep as possible;  avoid your doctor like the plague.