One of the tips I received when my quit was new was to 'welcome the crave'. Wish I could find those words to share with you.
The idea is - every time we hit a crave, it's an opportunity to beat it and for the quit to get stronger. Once I understood that, I went out looking for the things that triggered an urge to smoke. This allowed me to tackle the crave on my terms i.e. I was prepared rather than it creeping up on me unawares. Then I would mentally play a game of beating it with a hammer and shouting 'die, crave, die'.
I stood with co-workers as they smoked, sat on the bench outside the library where I normally smoked, went outside the house after dinner, etc. Doing this over and over again also helped prepare me for those occasional triggers that hit me unawares - I had a response I had practiced many times.
Everyone has their own way. Lighting a cigarette will not cause the flat tire (or any situation) to improve. We just need to learn to do these things without smoking.