Stay Healthy and Stand by Me

Typically we don't know or care about what's happening in our body until one day our body is reduced to the point of a wreck. We lose our appetite for food and feel exhausted constantly. In regard to the article Alternative Treatments to Cancer, Accumulated stresses and contaminated toxins contained in the body are the two main factors that trigger off the development of cancer. How would you avoid both the causes in order to stay fit and healthy?