Great, Repto, if you're drinking regular pop, that's a GREAT place to start.
I have a friend who was a real pop addict. When her son was living with her, she was trying to get off pop but he kept buying it, so she printed out a sheet of paper with a skull and cross bones and the word "POISON" and taped it to the bottle. She was able to quit, and her son even drank a lot less!