I smoked for 5 years up to a pack and a half a day of max nicotine cigs. One day it's like a switch flipped in my brain and I couldn't stand the smell of cigarettes on myself and my clothes. That day I went out to get a vape.
After trying a bunch of flavors I got high, low, and no nicotine juices of the same flavor. Then over the course of a year an a half I mixed in less and less nicotine. Substituting around two drops of the higher for the lower every week.
One day I just put it down because it was a hassle and most importantly I wasn't addicted any more. It was that easy.
I still smoke 1 or 2 cigarettes a month when the mood is right in a social setting, but I will never buy a pack of cigarettes again.