I don't know if that's an evidence based approach, but some people find it useful.
My dad, who was smoking at least 40 a day (and really smoking -- down to the filter, deep inhalations, carried on when he knew it was doing him harm) read it and cut down for a week or so, but then started smoking cigars (in the same way as he smoked cigs), and then switched back to cigarettes.
I think the current evidence strongly recommended a combination of psychological work and nicotine replacement. https://cks.nice.org.uk/smoking-cessation
Whatever works.
I mentioned this thread to her and she wanted me to add that there was no withdrawal and her behavior didn't change. When she has tried to quit previously it had significant effects on her mood. This time we (her friends and family) didn't notice she had quit until she told us! It was the best Christmas present.