No tobacco or alcohol. daily intake of fruits and vegetables. no stress and exercises to keep fit....................Prevention is best cure for cancer.

Calcium and Vitamin D. Recent studies have suggested that these two substances may not only strengthen bones, but may also fight off colon cancer. Good sources of calcium include: milk, cheese, yogurt, salmon, sardines, and dark-green leafy vegetables such as kale, mustard, and collard greens. Sources of vitamin D include salmon, sardines, fortified cow's milk, egg yolks, and chicken livers -- and don't forget the sun. Twenty minutes of sun before 10 a.m. and after 3 p.m. is an excellent source of vitamin D.

Fiber and Your Colon

Fiber is thought to be a powerful weapon against cancer. Though there is conflicting research as to whether or not fiber has protective effects against colorectal cancer, there is evidence that fiber intake improves overall health by moving wastes through the digestive tract faster. This may give potentially toxic wastes less time to come into contact with intestinal cells. It is also believed that some types of fiber help detoxify potential cancer-causin ...more

Source: C & P from http://www.webmd.com/colorectal-cancer/guide/eating-prevent-cancer

Never smoke or chew tobacco,fibrous food is good for health.