I stopped cold turkey on the first of this month and after a few days of continious headaches due to the caffine withdraws I was fine
Stopped craving diet coke all together(and I used to drink 3-4 12oz cans a day). I started drinking decaffinicated tea, alot of water, or sometimes I'll make a refreshing drink by taking crystal light peach and green tea packets, ice cubs, and a little lime juice, and a little water, and use a blender to blend it...amazing