I, too, am a pepsi holic. Last year when I first began alli, I began drinking a lot of water. I had to flavor it at first, but soon after, I began drink it plain. I still had my cravings for pepsi and I knew if I fought those cravings, I'd overdo something else trying to satiate that craving so my solution was to sometimes plan it as one of my snacks. I actually got the tiny little 8 oz cans, which are 100 calories and drank it and recorded it. I don't suggest to do it all the time, but I did have one of those little cans every day at first, then less than that eventually and I had no problems at all. So, if you honestly feel you need that pepsi, have it. But try to do less and always record it in your calories, etc.
I cannot do diet soft drinks at all. I used to drink diet pepsi all the time until I got a migraine that lasted 2 and 1/2 weeks. All I could tolerate for those two weeks was oatmeal and orange juice. I had a feeling the migraine had a food trigger so I introduced things back one at a time. As soon as I had 1 diet pepsi, migraine returned. I knew then that nutrasweet was my trigger. The only "diet" soda I can tolerate now is the Sprite zero. I do use splenda to keep me sweet ;)
Hope this helps you!
I will lose my behind in 2009!!. SW: 195 CW: 195 GW:100 Karen