What jdarg said. I quit using Wellbutrin and Nicorette. I had failed twice before using Nicorette alone. Wellbutrin/Zyban makes it a LOT easier.
Another thing I did - and my family and co-workers had a ball with this - was to take a drinking straw, cut it in half, stuffed a piece of a Kleenex in it, and held it like a cig when I needed to hold something. Sometimes, I found it necessary to act like I was smoking it. I looked really stupid, but it made the cravings pass more quickly. Eventually I was able to trade in the straw for just some good old-fashioned deep breaths.
I also visited an online message board for folks quitting smoking. The one I used to go to is no longer at that site, but I'm sure there are others. It is helpful to know there are others feeling what you are feeling when fighting the "nicodemon." That was, of course, before SoWal.