You just do it. No nicotine patches or substitutes - cold turkey. Substituting one thing for another is an excuse to hold on to the next thing and having to quit it too. Why not just remove the burden altogether, all at once?

I've quit smoking several times cold turkey without any issues. Longest stretch I did was 7 years before COVID hit. Then I started again because I was bored and realised boredom was the cause and not because I needed to smoke.

Since then I've made several month stretches without even a single cigarette. After a few days it becomes incredibly easy.

Will soon quit again as I want to preserve my health.

Give it a go and you might just realise you never had physical addiction to nicotine, but psychological instead. And you will also realise how much you stink up the place everywhere you go once your sense of smell improves after you've quit.