You would be wise to start making changes to your normal smoking patterns before your actual quit date.
Get off automatic (they call it tracking here)
When you want to smoke, ask yourself if you really need that smoke or if it is one of the automatic ones.
If it's one of the automatic ones?, tell yourself to wait a little longer.
Make it a game with yourself.
You will learn a lot about yourself and you will come to realize that you don't really need to smoke every time you think you do.
This is a major lesson learned. before your actual quit and that learned knowledge can fuel the beginning of your quit for you.