I am trying to not drink soooo much diet soda so that I can get all my water servings in for the day. This seemed impossible at first since I (used to) have about 6-8 cans of soda per day. So now I cut back to 3 cans (not 20 ounce bottles).
Everytime I have 2-4 servings of water, I treat myself to a soda. Sometimes I am so full from all the water that I don't even want the soda. I am cutting back even more than I had planned.