I know that when you go on Stage 1 of the South Beach Diet, the first thing you do is lose the weight off of your belly & waist. What do you do different on that stage? You avoid all of the bad carbs & also fruit. No potatoes, white rice, pasta, sugar...fruit. It was terribly hard for me to do because I'm a sweet-o-holic, but the hardest for me was giving up fruit! But at the end of 2 weeks I noticed a big difference and I didn't have the cravings anymore. That is why they start out with that - to rid you of your cravings.
I know Robin, Dr. Phil's wife, had worked out and felt happy with everything except her belly and she mentioned it to her pharmacist. (Weird person to ask, if you ask me.) Anyway, he told her to cut out all sugar, so she did and she was able to flatten her tummy, too.
My worst area is my tummy/waist but I just can't kick that sweet tooth for the life of me! I had the flattest, firmest belly until I was around 30 and then "something happened" - life.