Switch to diet cola for now. How about tea? It has caffeine and you can drink it hot or cold with or without milk/sweetener.
One change at a time so you don't overwhelm yourself and feel like you want to give up, you know? Good luck!
2014 Goals- 153|144|140- GOAL (maybe?)!
Success is not final, failure is not fatal: it is the courage to continue that counts.
- Winston Churchill