Basically I regard my cancer simply as a bi-product of having been born in a human body. Every person on earth will fall ill and die. Mutation causes cancer but it also makes biological life possible. I think ordinary good health habits are important so that we feel ok and show positive care of our bodies and self respect. I just use common sense and keep away from extremes in health habits. There are absolutely no co-factors in my very rare NET except for possibly age, over which I have no control! That said, I do believe in industrial safety and controls, and things like not exposing civilians to nuclear testing.
One thing we CAN all control--not blaming ourselves or others. No one is perfect, and we all make mistakes. Friendliness and compassion are a good way to go--towards ourselves and others.