Have any of you quit smoking?and how did you succeed?

Like yourself I have quit a few times, but everytime I have restarted. Worse thing is that often I could go months without smoking but then something would get to me and through stupidity I would buy a pack of 10 as I would remember the calming experience I got from smoking and then that would just throw me straight back into being a smoker again. I keep attempting to quit but one of the things which is making it difficult for me is that I work from home so am pretty much my own boss, which makes stopping for a smoke a lot easier than when I worked in an office. I do plan to quit again and next time will be a two stage plan. Initially I will try and cut down on the amount I smoke till it's only 3 or 4 a day and then I will just stop completely. Doing this has worked for me before I just then need to work on a way of making sure that stressful situation don't cause me to start again.