The way to undo the connections to smoking is with positive reminders and SMALL changes in your old routine.
We suggest people who have trouble drinking coffee because it reminds them of smoking to drink it with the other hand or in a different location than they did as a smoker.
Self talk is another reminder. "I don't do that anymore." (stop telling yourself you can't do it or you need a cigarette)
You could get a jeweler to engrave something like "I quit and I'm glad I did" on something to hang from your rear view mirror or put on your key ring or a necklace.