Here's something that might help. Pick out something you want for your bike that you have been putting off because it costs more than you want to spend, maybe a bore kit, whatever. Every day, twice a day, however long it took you to finish off a pack, put the price of the smokes in a jar. Keep a running tally of how much you've saved up and how much to go before you can go buy whatever you wanted. Any time you are thinking about giving in, remind yourself that it will mean you will never be able to get what you were saving for.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python