Best way to get off smoking is to start vaping. Get two high drain 18650 batteries, a quality charger, a dripping atomizer and a mechanical or regulated device.
Actually vaping can be much more fulfilling than smoking, whether you are looking for a nice flavor or a nicotine high.
Building and wicking coils yourself, mixing glycerin with flavoring to produce your own blend, as well as maintaining your equipment clean, are part of keeping your mind interested and occupied when it comes to getting your fix which in my opinion is key.
Nicotine absorption is much more efficient and you end up ingesting less of it when you find your sweet spot.
Then you must replace smoking with vaping in activities that are linked with the smoking addiction, (like when waking up, or during coffee, or after lunch, or after sex, when having a drink, etc.)
Then before you know it, you won't be craving cigarettes any more as the psychological addiction would have been cured. After that you can either continue vaping or slowly stop vaping as well. Some people keep vaping just flavoring and drop the nicotine completely.
If you stop vaping, keep your vaping equipment around, because triggering a smoking habit in the future due to unforeseen events, is highly probable.
That's anecdotal information of course, but works for me and a lot of other people it seems.