No one quits until they really, truly want to. I quit over three years ago cold turkey and never looked back. Some people need coaching from someone who specializes in smoking cessation, some people need the patches or gum, some people need hypnosis, and some people even need something like Wellbutrin to help them quit. There's no one right way to stop. It just depends on the person. Some people can just stop and be done, other's can't. For me, I got really heavy back into my fitness and weight training. It gave me goals and activities that simply did not coincide with smoking at all. It was something I wanted more than a cigarette. A friend of mine took up running when he quit and has done several marathons in the last couple years (he quit right around the same time I did). But, neither of us would have stopped if we weren't ready to do it to begin with. Maybe your dad needs to talk to someone who's got experience in helping people quit? If he's been smoking a long time he simply may not know how to go about giving it up. It's too much a part of him and his psyche at this point to just stop, possibly. Most cities have groups offering smoking cessation programs, so you might look into that.
jag