You can't smoke if you don't keep any around. (if you live with a smoker, this may not apply)
I can't tell you how many people have lost their quits because they kept cigarettes around for an "emergency."
If you have to get dressed, find your keys, walk to the car, open the door, turn on the ignition, back out of the driveway, get to a store, walk in, get out your money, ask for cigarettes................
There are a lot of steps before you can smoke if they aren't sitting in a drawer in the next room.
Every step is an opportunity to think about what you are doing and change your mind.
Smoking is not required. Breathing is!