I'm exceedingly happy with myself. Pleased as punch and content as a clam in mud. Why? I've recently completed the single most difficult thing I've ever attempted: I quit smoking.
Before I actually finished quitting, I was all "How hard could this be?" and "I'll just make the decision to not smoke." And, then, struggling down the tunnel of my actual smoking cessation, I found it much, much more difficult than I had ever imagined. All the wisdom about nicotine addiction being so insidious seemed absolutely true. The simple decision to not light up turned into an epic struggle of willpower.
And, I'm a WoW player. Spending my time in Azeroth actually made the quitting process much more difficult, until I learned to alter my game play in ways that helped me over the hump instead of making it more challenging. There's a lot of little things that you can do while playing WoW that will minimize your temptation. Here's a few tips for which might help you put the cigarettes down, even while putting down the evil forces of the Scourge. (Or, at least, these are things I found worked for me.)