If you feel overwhelmed and prefer a meal plan to follow, then the South Beach Diet (which is similar to the Mediterranean diet) is a good place to start.
The emphasis is in lean proteins, nutrient rich and fiber rich vegetables, and low sugars. There are healthy fats in avocados and nuts, and the plan works together with a fitness plan - so you don't have to think, you can just follow the plan until you start to feel more confident about your food choices.
It's not specifically a cancer-fighting diet, but it's not just for weight-loss either. The goal is to make healthier choices, so it's a good place to start when you prefer a structured system to follow. As you make choices within the diet, think about the foods that fight cancer (like broccoli, and green tea) and sprinkle them in.
There are many books written on the South Beach Diet. Be sure to visit www.southbeachdiet.com for more information and the latest tools to make this diet work for you. As always, work together with your doctor when making any dietary changes.