I found for myself that cravings for drink were not really that much of an issue. I made up my mind to quit and that was that (so far, knock on wood!).
What's been really hard is balancing out my life so that I'm not just not-drinking. Being sober is a very different way of living and I find myself meeting lots of ups and downs. The challenge has been meeting them and trying to improve my life, instead of just living with the mess.
And also reminding myself just how bad it was. I do really worry that I will forget and think that just because I quit, I don't have a problem!