It can be done SpideyFanMan. I used to be a "carboholic" - both in my drink and food choices. Now I've completely given up sodas (diet and regular) and I rarely consume junk food. I used to eat A LOT of foods that contributed to my downfall.
If I can do it, so can you!
PS - I think the (unsweetened, naturally-flavored) tea idea is a good one. I know some people who find that it helps to fill the void.