Giving up cigarettes was one of the best things I've ever done, good on you dude
Habits are a peculiar, interesting part of the way we act and, whilst giving up, being able to see it objectively made it a lot easier. Not doing it will make you more aware of your actions, take advantage of this if you can and see how you act when you want something as opposed to when your body/brain wants something. We're peculiar creatures and times of change can tell us a lot about how we work, or how we think we work. It can be surprising
I won't wish you luck as you've already made the decision you need to make, instead I'll congratulate your sensible decision and hope you may make many more
This is my sandvich. There are many others like it, but this one is mine. My sandvich is my best friend. It is my life. I must master it as I must master my life. Without me, my sandvich is useless. Without my sandvich, I am useless. I must eat my sandvich true. I must shoot straighter than my enemy, who is trying to kill me. I must shoot him before he shoots me. I will. Before lunch I swear this creed: my sandvich and myself are defenders of my country, we are the masters of our enemy, we are the saviors of my life. So be it, until there is no enemy, but sandvich. Om nom.