For me quitting tobacco was easy.
I got a nasty cold/flu virus and was in a semi-coma for three days, barely waking up enough the rehydrate and urinate.
After the fever broke I realized I had gone three days without smoking. I also realized that quitting isn't an action but smoking is.
To smoke requires a series of actions: obtaining a cigarette, lighting it, putting it to one's lips and inhaling the smoke.
Quitting, on the other hand, requires nothing. Simply don't do anything.
Every time you put out a cigarette you've already quit. Just don't start again. Once I realized that simple fact. it was easy. I simply didn't smoke cigarettes any more. That was in February 1985.
I didn't suck out and be a crybaby by making a big deal out of it. I still used a pinch of tobacco in my hash doobs. I still sat in the smoking car on the train or smoking sections of restaurants because there were fewer children there. I simply stopped lighting cigarettes.
The desire to light a cigarette 20 minutes after a hash-tobacco joint lasted barely six months. After that, nada.