You need to identify every reason you smoke a replace the cigarette smoking with something else. Like every time you get the urge to smoke because you are stressed you go for a walk instead. Or if you are bored then you find a hobby to do. Do this for every reason you smoke.
Also, make it harder for you to smoke. Like buying the smallest size pack. If you do this then you'll force yourself to out and buy a pack every time you run out. Another one is to pledge that you will never smoke inside so you'll need to go out every time you smoke. I would also keep my pack inside a cash box, or something similar, with a combination lock. Again, you want to make it difficult to smoke so that it becomes a hassle to smoke so you think about why you are trying to stop and it stops being an automatic function.
For example; I didn't quite know how to structure waking up. For years, I'd wake up, make coffee and smoke a cigarette. I had to carefully think about all the occasions on which I smoke and figure out what I'd do instead.
It's been a few weeks now and it definitely got easier. My new habits are slipping in and I haven't had the slightest temptation to light a cigarette in the last few days.
I'd also like to add that it highly depends on the country in which you live. In Eastern Europe (where I live) smoking is still very prevalent. Up until two years ago, I was smoking in restaurants and bars. In summer, all the terraces are full and there's a ton of smoking. Cigarettes are cheap and easy to come by. It does not make it easy to quit. I can imagine that in the US or Western Europe, there are less temptations.
Also don't kick yourself when you do have a smoke. It took me 7 times to quit fully.
My personal experience so far is that it is a mind game. You need to truly tell yourself that there is zero possibility to smoke. Unless your mind accepts that, it is not easy to stop.
I hope any of this helps, good luck.
If you have a ritual of coffee and cigarettes, best give up the coffee as well for a while.
I couldn't stand the idea I was in the 10%. That was six years ago. I never smoked again.