I was searching around the blogosphere and up came this great blog by Leo Babauta

His story begins where mine did, when he quit smoking. And the leverage he has got off that habit change is amazing.
He has a guest post on the site from Scott Young that deals with eliminating habits.

It’s a great post and you can read it here:
http://zenhabits.net/2007/07/20-tricks-to-nuke-a-bad-habit/