As Dasmi said, you'll stop craving it after a while. Surprisingly enough, a while after I gave up soda I decided to have a Sprite, but was disgusted by how sugary it was. Once you get the stuff out of your system and you change what your palate is used to. It took me a while to get rid of processed sugar from my diet, but after weaning off it slowly it finally has worked and paid off; I really can't go back either. You learn to find things to replace that sweet feeling with, like certain fruits.
As for fluid intake, learn to make your own fruit smoothies, or learn to love tea. There are so many which don't need to be sweetened, because they're naturally that way.
Oh, and fast food. I unintentionally got rid of that from my diet when I moved across country, and after I year I had a craving for Taco Bell. My body was so not used to the crap that I spent the night in the bathroom with an incredibly upset stomach. I counted that as a blessing.