If you are serious about quitting, start challenging your day to day routine as a smokier.
Smoking is so automatic you really need to see what you are doing and start changing things up or you may never escape it.
You can read until your eyes get blurry but if you don't put it into practice, it means nothing and you gain nothing.
Change it up.
If you smoke in a certain place, go someplace else and smoke. If you smoke at a certain time, delay it a while.
You need to establish where you are going before you start the journey instead of dreading your quit date and blowing it.