I haven't craved a coke (diet or otherwise) in a while... one of the things I used to substitute for diet cokes as I was quitting them is spritzers: a SMALL amount of juice (about 1/4 cup for a 16 oz drink - about 30 calories) with club soda (fizzy - no calories, no artificial sweetener, just water and bubbles). Cranberry and grapefruit are my favorites