Cigarettes are an insipid addiction. I quit 20 years ago, but it was tough. First I quit buying them, but would bum regularly off smoking friends until they started griping about my mooching. Then I started picking through the ashtrays at work, salvaging a longer butt or two. When someone caught me doing that I was mortified with embarrassment and finally quit.
Since quitting drinking I have taken up cigar smoking. Gives my hands and mouth something to do when I am sitting on my deck.