Making changes to lifestyle

I'm sure I will get a lot of argument about this stance, but I don't think they have found that any specific food causes breast cancer, when consumed in normal amounts. Caffeine may make you have more lumpy breasts which may make it harder to detect cancer.
But I don't know that it causes cancer in normally consumed amounts.

They do know it is good to keep your weight at a healthy level.
This study was for BRCA women http://www.hopkinsbreastcenter.org/artemis/200510/21.html
and this in general http://www.hopkinsbreastcenter.org/artemis/200205/feature18.html

Most women who get breast cancer end up dying from some other disease. It has been shown that exercise and a healthy diet help prevent deaths from other causes, such as cardiovascular causes or diabetes. The jury may still be out about breast cancer.

As far as hair dye goes, well, maybe it depends. There are and have been many kinds of hair dyes. Sometimes the effect of carcinogens does not show up for decades. Some hair dyes that were used in the 1970s were banned, according to this abstract. "Today, there seems to be no relevant bladder cancer risk from the use of oxidative hair dyes." http://www.ncbi.nlm.nih.gov/sites/entrez..._RVAbstractPlus

"An open question is whether current occupational exposure to modern hair dyes is still related to some excess bladder cancer risk <snip>These findings, therefore, require further research, particularly since they may be influenced by selective publication of positive findings (publication bias). None of the other neoplasms extensively studied, including breast, skin and lung was related to hair dye use." http://www.ncbi.nlm.nih.gov/sites/entrez..._RVAbstractPlus

Personally, I don't consume caffeine, but I didn't before my diagnosis. I'm sure I eat more sugar than I should, and I'm not at my ideal weight. I'm probably 15 pounds over my ideal weight.

So eat healthy and exercise. If it isn't good for breast cancer, it will probably help prevent other diseases.

I have to agree about the crap-shoot theory because we simply do not know yet what is/are the turn-on mechanisms that allow some women/men to develop BC (or any cancer) and others not.

I was an extremely healthy eater, exercised like a fiend, was at perfect BMI and got it. My fraternal twin eats so much red meat, junk food, moderate to no exercise and she is cancer free.
I second guess the wine I drink or the birth control pills I took....but who knows. As someone else pointed out, how many alcoholics there are and not all of them get BC or any cancer....
I am a healthy eater from decades of doing it so doubt I will change much of my pattern, but now if I crave a steak, I have it. If I want dessert, I have it.
Someone else here posted that we are all going to die from something and though I am all for doing everything we can, I have learned the hard way that still isn't a guarantee of a good outcome.