Someone here (think it was Lu) mentioned a good book for giving up smoking.
If I remember rightly, it worked by making you believe there was nothing to give up because it was all shit.
( Bob Todd whee, Wed 2 Sep 2009, 22:02, archived)

This was pretty much why I gave up.
Round about 19, I thought, "Why am I doing this? It's costing me a fortune, and it's not even enjoyable", and ditched the habit overnight.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Wed 2 Sep 2009, 22:30, archived)