@DenaliBluesfrom about the 6 week mark to the 4 month mark I went through pure hell. What helped me through it was I started monitoring everything that I was eating and drinking. Turned out I was (am) addicted just as bad to sugar as I am to cigarettes and by "treating" myself to sweets I was only making the cigarette craves 20 times worse. Ditto for coffee but not quite as bad. Once I cut out all the sugar, carbs and caffeine the craves went from off the charts to very manageable. My personal opinion is that taking a very reductionist view of quitting smoking can be counter productive, but if you take a holistic approach of getting as healthy as you can and quitting smoking is a part of that then you might not have those individual craves feeding off each other. I think I termed it once as me giving into one addiction makes all the others throw a tantrum like a spoiled brat in the supermarket when momma says there's already coca puffs at home. At that point there is nothing to do but ride it out, pray you can go to sleep and the morning will reset things to try again.
As far as other tools, you can try sleep hypnosis videos. There's tons of them on youtube. you can also try EFT tapping. again, tons of videos of it on youtube, find one you like. it is some goofy ass shit but I swear it got me through some of my worse experiences. And lastly are the Wim Hof guided breathing sessions. also on youtube.