One of my successful Quitters told me his way of dealing with moments of cravings was to consider the urge as the enemy knocking at the door to steal his Life. He took it as a death-struggle challenge and visualized beating the schitz out of this enemy. By the time he finished whipping back the Devil Nicotine, the urge passed.
A technique that will help is to list 10 things (or more if you like) that you want to experience or that are cherished memories that all take place in the two-three minutes it takes to smoke a cigarette. It can be things like watching your child walk up to get a diploma, your child walking down the wedding aisle, a sunrise breaking over Grand Canyon, listening to that special song that you fell in love to, the first time you drove that new truck off the lot, etc. List those on a piece of cardboard the size of a pack of cigarettes and carry it in the same place you used to carry your cigarettes. When the urge hits, read through your list and focus on each item and imagine being alive to the experience. It will reaffirm just why you are fighting for your Freedom.
Have you said good-bye to cigarettes? You need to make this symbolic gesture. For many smokers, tobacco is the one friend that has never let them down (until it kills you and/or strips your quality of life). Cigarettes are nicotine-delivering devices---when you inhale the nicotine it is into the bloodstream and to the waiting receptors in the brain almost immediately. What friend has ever been that obedient? To say good-bye, write a farewell letter to tobacco. List all the times it was there when you needed your fix the most. Then list all the reasons why you are saying good-bye----at the top of the List should be your full awareness that your long-time friend is going to kill you sooner or later. When we had Group Quit Night---we'd go out to a campfire and everyone would read their good-bye letter and crumple it into the fire. I've had a lot of my Quitters tell me that was a powerful exercise that got them over the hump. (Just don't set fire to any more Saguaros).
As to some of the other health concerns---depression, insomnia, not getting to the gym, etc. don't automatically assign those issues to the effects of quitting tobacco. If you do you are generating a rationale to start smoking again---if I smoke, I'll get some sleep? If I smoke, I'll not be as depressed. It is 'normal' for one's sleep cycle to change as we age ---I've had insomnia since I was a child and I consider it a gift---how else would I be able to stay up half the night reading Edgar Rice Burroughs Tarzan and sci-fi novels? Check with your Doctor on those concerns---you can get your sleep cycle under control with natural supplements like Melatonin. You don't need a gym to crank out some push-ups, sit-ups, walking, using canned food for weights, etc. Also, the Ashline is not a one-and-done---you can re-up and get a new coach that may click for you.
Realize that in the time it has taken to read this, several people have died with their tobacco addiction as the major contributing factor. It is a big co-factor for those dying with Covid-19. You are not one of them---you still have your power to whip the schitz out of the enemy . . . and drive that new truck to all those outdoor adventures on your Bucket List.