I quit a few years ago. I was smoking about a pack a day. I didn't step down or any of that; I just threw my pack away and said to hell with it. I guess everybody is different, but weaning myself off of them would have never worked. I talk to so many people who are like, "I'm going to finish this pack and that's it." Then they buy another pack. For me, I needed that commitment, that first step, of actually throwing good cigarettes away.
It was awful for a week or two. I had terrible headaches, cursed like a motherfucker, and got pissed at everybody for anything at all. Eventually, though, it all evened out and now I rarely ever have cravings, even when I'm drinking.
If your desire to quit is stronger than your desire to smoke, then you'll quit. It's that simple. That's the kind of thing that can fluctuate though, so as soon as you feel that motivation, run with it. Trash your smokes, commit to quitting, and you might be able to stick with it. That's how it worked for me. *shrugs*