Water and vitamins. I used to think it was worth it when I was in my 20s, kind of got sick of being sick in my 30s. Having quit last year, I can honestly say life is soooooooo much better! One of the best feelings in the World is waking up on Saturday or Sunday rested and relaxed at 7AM wit hthe entire day in front of you not foggy from the night before.
I also found ignorance is bliss. As you start to become aware of the damage you are doing but do so anyhow (addiction) there is no fun, only misery in the process.
Good luck!