I started cycling to quit smoking. Haven't quit yet, but I assume that I'm better of than if I just smoked and didn't exercise. Once my legs were in better shape than my lungs, I started having hernia and knee problems, so I'm still having trouble riding hard enough to really slay my lungs during rides, which really helps me in not wanting to smoke anymore.

I drink plenty, but good beer is one of my true loves, so there's no guilt there. Luckily, I'm not predisposed to alcoholism. If only quitting smoking was as easy.