Put on the brakes.
Change your thinking. Stop dwelling on smoking.
Thinking of smoking makes you get closer to doing it.
Bite into a lemon.
Stick your head in the freezer and count slowly backwards from 20.
It takes less time to stop those thoughts than to follow through.
Do this for you.
Please believe the elders, it works, at this time all I have left to do is change my thinking. At the beginning all things listed by Dale might be necessary, but with time, one by one will fall out, and sticking with our commitment for a healthy life will be all that is left.