I think every smoker has a 'thing' that makes them quit.
This is true, we need all the methods because we're all different. If something doesn't work for you, try something different. Whatever method you choose, you'll likely do better if you have support, whether that's friends and family, stop smoking services or mumsnet threads.
I started smoking age 12 and carried on for 3 decades. I tried lots of times to quit and sometimes managed it for a few weeks or months but always relapsed.
My 'thing' was vaping. It's been 6 years now. I just checked my old spreadsheet and in that time I have not-smoked 33,285 cigarettes. DH switched over at the same time and the combined savings have enabled us to pay off our mortgage. I think we spend about £7.50 a week between us on vape stuff.
I still vape and I'm still somewhat addicted to nicotine, although a lot less so. I never get that climbing-the-walls feeling I used to get if I'd gone without a fag for a few hours. Nicotine on its own is not much of a health risk - it's about like caffeine. I can enjoy a vape with my coffee and still breathe.
My health has massively improved, I'm counted as a non-smoker by the NHS and I no longer smell. Best of all, I'm relapse-proof.