One day at a time. Remind yourself that it will get easier each time you say no to the addiction. Try using an online support group- since I live in Minnesota, I used quitplan.com but there is something similar for each state. I logged in every day, celebrated milestones, had access to phone support 24/7 and met a lot of super nice people supporting each other in the same goal. Those online tools helped me reaffirm my commitment each day.
I also bought a package of straws and would chew on one every time I had those strong urges. That helped a lot and also saved my teeth from sugary hard candies.
The biggest tip I can offer is that you created a smoking habit involved in most everything you do, and you spent years making it a habit. Now, it is your job to replace those habits with something else. After dinner, do something enjoyable instead of lighting up- maybe a walk? When you first wake up, change your usual routine to a habit that isn't associated with smoking. A new habit takes 7 days to become a habit.
Lastly, do not allow yourself to negotiate having "just one" puff or "just one" cigarette. Because it is never just one....
You are a non-smoker now. Simple as that! Best wishes to you...I don't know you, but I know you CAN do it!