The single best advice i can give is this. It doesnt matter what else you do, just stop drinking sodas altogether. Diet or not. That is the easiest way to change your weight that I have come across. I only drink crystal light or Ill go to a restaurant and order a glass of ice water and a big bowl of lemons and make my own lemonade. I lost my first 10 lbs only doing that. Its easy and you can work up to other things.