It astounds me when someone has a "revelation" such as this, when a quality diet and exercise are such common sense issues. My wife and I exercise every day (I just returned from a 2 mile morning walk), we eat a very healthy, balanced diet, and don't take any pills whatsoever (including supplements). We both sleep well and always feel great, and we only see a doctor for our annual physicals.
With all the proof that exercise works, and all the proof that being fat leads to significant health issues, I'm amazed that anyone would choose to be obese. And make no mistake, being fat is indeed a choice.