Choose plant sources of protein over animal. Women with the highest intake of animal fats and proteins, have higher rates of breast cancer.
Lentils, beans, seeds and nuts are all loaded with wonderful chemical constituents. Try soaking mung beans or other pulses(lentils) they are soft enough to eat after a day or two of soaking and have the beneficial enzymes and nutrients of sprouts. Even soaking almonds or sunflower seeds for a few hours begins the germination process.
The latest skinny on soy involves a study looking at 5000 women in china. the conclusion which went viral around dec 8 2009 was that soy IS protective. the women with the highest intakes had the lowest rates of breast cancers. This is contrary to what many people were hypothesizing.