I quit smoking twice; once about 15 years ago, and then again last year (I started again during COVID lockdowns), both on the first (serious) attempt. Both times went relatively easy, the tricks were 1) make sure to scrub everything from everything smoking-related, 2) don't have friends who smoke, and 3) make sure you have $stuff to do (work, games, TV, books, whatever).

Especially 1) and 2) are what this article is about: make it harder to do $bad_thing and don't be reminded of it.

I don't think I'd be able to quit if cigarettes were easily available to me.