If I'm grilling chicken and and I bring it to the table only to find it's underdone, I have to put it back on the fire. Have you had this happen to you?
I find a striking similarity to an undecided/unprepared quit. It keeps going back on the fire.
If you plan your course well, (as in baking your chicken before you grill it), your outcome becomes foolproof!
Plan your quit to win
Find things you know will distract you when you get a craving.
(Positive self talk rather than talking yourself into smoking. Bite into a lemon, skin and all. Stick your head in the freezer and count backwards from 20.)
Find something that gives you a dopamine release to replace what nicotine gave you. (exercise, music, chocolate, hobby, volunteering)
Plan to allow the time it's going to take.
You don't believe a chicken thigh will cook in two minutes do you?
Know it will get better. When you break your arm, it doesn't heal in a week.
It's gradual, but, it happens.
Let it happen