MauiKai is right, there is huge amounts of sugar and aspartame in diet sodas. Aspartame has the same effect as cigarettes with nicotine. So your basically drinking nicotine in a soda. I quit cold turkey too. I now drink water (alot) or Powerade, its calorie free, no aspartame, and it fills you up, also it is really good for you. Hope this helps you kick the heck out of the diet soda obsession.