The worse is cigarettes for me. But I roll my own from natural tobacco to make myself feel better about it. At least I don't have a chronic cough or anything. Have been thinking about the "electric" cigarette that hits the same but it's vapor instead of smoke. I'll try it at some point. All I know is Chantix made me crazy by the 4th day and the patches didn't do anything for me. I think for me it's more the habit than the nicotine. 
2nd is chewing gum. One brand, one flavor, if a store doesn't have it, I will go to another store that does. LOL Don't know how in the world I will break that one. I'm sure quitting smoking will help because I won't feel the urge for the flavor as much. 
3rd is Coffee. If I don't get a morning jolt, I'm dysfunctional the rest of the day until I get my fix. I have been able to switch to tea easy enough, so I go between the 2.