It is good to have a mentor through this process. I suggest many mentors. See your nutritionist, doctors, surgeons, and fitness experts as the experts in guiding your to personal expertise. Keep a blog or journal of all your activities. I am haven't been so much, but I do keep it in my head and tally calories, fat and protein within my daily ranges. The Daily Plate is an excellent resource, as is Sparkpeople but I LOVE LIVESTRONG.COM. They have partnered with the Daily Plate for food logging, and I am impressed with it. Sparkpeople is excellent all around, but I think Livestrong gives them a run on the forums, sense of community, and food/exercise logging.
Okay, I promised yesterday a run down of my supplements:
CLA Tonalin - For fat metabolism
Chromium Piccolinate - for glucose/insulin production
Flintstones Chewables - multi-vitamin
Omega 3 - fatty acid for brain and cellular health
Emergen-C - As needed when plagued by questionable characters in Walgreens
TUMS - Calcium supplement for strong bones
This combined with a low carb, high protein diet.