1) Eliminate sugar from your diet 2) Eliminate red meat from your diet
This improves survival rates by orders of magnitude.
The sugar cancer link is becoming increasingly apparent, and is the elephant in the room. Excessive red meat can be a problem as well, but from everything I gather, sugar is the real culprit. Sugar raises insulin levels, promoting cancer growth, causing metabolic problems, and inhibiting apoptosis, then feeds that cancer with excessive glucose in the bloodstream.
Want to avoid or treat cancer with your diet (along with diabetes, heart disease, and autoimmune diseases)? Stop ingesting sugar!