I thought I'd offer three pieces of advice for new quitters. Perhaps others will join me and offer their perspectives as well. My advice comes from me, and I speak only for me. My "truth" may not be "THE" truth!
1. Train your mind NOT to go too far ahead. When I first quit, the thought that I could NEVER have another puff was frightening and overpowering. I've tried and failed at so many "rest of your life" things, from quitting smoking to making dietary changes to exercise programs, and each time, the thought that it was going to a permanent, life-long thing made it too daunting and I soon gave up.
Instead, when you find yourself thinking about the distant future, bring your mind back to the here and now. Can you get through another hour? Can you reach the end of the day without a cigarette, even though the cravings are strong? Could you postpone any decision about having "just one" until tomorrow?
String enough day-at-a-time moments together, and soon you have a week, or two or three or even a month - and then you begin to see that you just might succeed at this quitting thing.
2. Name your adversary and start talking back. To be honest, it's been a while and I can't remember what I used to call him, but it was probably something like Nic or Evil Nic or whatever. I gave my cravings a name and a personality, and I started back-talking. I would have a mental dialogue with my adversary, and started putting him down. "That the best you got, Nic?" or "Seriously? You think I'm going to go out in the rain and have a smoke?" or "You're getting weaker every day, Nic. So sad, too bad!" etc.
3. Consider avoiding high trigger situations for a while. When I first quit, I couldn't imagine being strong enough to handle certain situations, so I avoided them for a while as best I could. I would stay away from smokers (easier for me than for others, because I live alone). I wouldn't go to bars for the time being. I would go out of my way to walk around someone smoking outside a building.
I knew that eventually, I'd have to be able to handle those situations, and that turned out to be true. But I needed stronger "I don't smoke" muscles than I had at the beginning. I let my quit get stronger and stronger, and then began moving into high trigger situations, and as I succeeded in them, I felt more powerful and capable.
If I were to add a fourth tip, it would be this:
4. Try to see the humor in all of this. I know it's not funny, it's challenging and agonizing and difficult. That's why, to me, it's even MORE important to laugh about it all - about how you let yourself be taken hostage by tobacco, how you crave a cigarette in the most ridiculous times and places (in the shower, anyone?) and so on. If you can step back and have a good belly laugh about it, you'll go a long way to strengthening your resolve.
That's my tips for the day. Good luck! You can do it!