I just deferred the decision to have one cigarette.
When the urge came up, I put it off five minutes.
And crucially, the rules allowed me to have one if I really wanted.
At first there was lots of deferring and then deciding to have one.
Eventually I just deferred the decision five minutes then five minutes more and on and on forever.
The reasoning is that your subconscious mind does not like "giving up" anything. "Giving up" implies you are losing something you value for nothing in return.
When you defer the decision to indulge your addiction, you are not fighting against your subconscious - remember the rule is you are allowed to have the thing you crave.
So in effect I never gave up smoking, I'm just a smoker who deferred the decision and never decided to do it.
I "stopped smoking" about 20 years ago. I'm still a smoker but just haven't had one for a long time.
"Giving up smoking" is very hard. Deferring one cigarette for five minutes is easy.
Off topic also, I highly recommend the podcast "The Vaping Fix". It's closely related to Silicon Valley and is compelling binge listening.
https://podcasts.apple.com/au/podcast/the-vaping-fix/id15628...