Avoid getting too much sun (melanoma); reduce your read meat consumption (colon cancer); don't smoke, or quit if you currently do. Some studies have indicated t

Avoid getting too much sun (melanoma); reduce your read meat consumption (colon cancer); don't smoke, or quit if you currently do. Some studies have indicated that grilled meats can also increase the chance of risk. Other than that, pay attention to your body. My colon cancer indicated by bleeding that was not regarded by my GP as more than just a potential hemorrhoid. A year later a thoracic surgeon discovered a 5cm mass. I got lucky...