Congrats on your success, Charles! You are definitely on your way!
I agree with FlyingDutchMan. Make a plan for when the cravings hit or when your resolve lessens. There may also come a time when you think, "hey, I've got this under control. I can smoke once in a while and not have it snowball."
It will snowball and you'll be right back where you were before you quit.
So stay vigilant. Working on sobriety has to be part of every single day.
A journal is fantastic. I kept one when I quit booze three and a half years ago (OMG! already?) and found it extremely helpful, especially when I wanted to cave. I'd go back and read the first entry and see how hopeless I was.
And of course, daily visits here.
This place rocks.
Keep it up, you're doing great!