Congratulations! I am a few days behind you and looking forward to starting sixth month alcohol free and fourth smoke free.
I have written several times that cigarette cravings have been much more difficult to beat than the alcohol ones for me. After many failures, this time I was determined to try something different and got 'Champix'.
I don't know where you live and whether you have access to them. In the UK I could ordered them after completing a form on-line and then collected them at the pharmacy. The secondary effects look very scary. I had none of them. It was not a miracle but it help immensely.
You don't stop smoking immediately. You decide a day to quit after 2 weeks. Perhaps it will work for you to start the 15th of December with Champix and quit on 1st January, for instance?
It is so nice to be totally clean. One 'sobriety' reinforces the other too. When I think of smoking, I know it will lead me to drink and viceversa. Feels like a double disaster after these achievements.
Good luck and well done