Yes I had a moment on Monday evening where I felt that I'd let everyone down and was feeling really down thinking what have I done, this year has just been so tough with trauma and bereavement in the family that I just needed an outlet
My friend has written a book on this topic and has done a lot of research.
It works well getting into habits like meditation and flossing.
As long as you focus on your end goal and progress slowly it should work for transitioning from smoking to vaping.
It doesn't apply to anything with a rush.
The many things I've taken away from discussions is that guilt can break a habit.
Also, if you say I won't do x, and you do it is a slippery slope.
So, once you have one fag it is easy to say whatever and keep smoke as you have already broken the habit.
If you set the limit to 'I won't smoke before 9am it is much easier to manage.
You can gradually but the cut off later. If you go until 12 the next day that is fine, but don't push you cut off to 12 just because you did it for one day.
Set a schedule, every X days push the cut off by a set amount of time (30 minutes or an hour).
For me, I vaped for a while and I have a few packs on my shelf. After a night of drinking, I had one and didn't enjoy it.
I haven't touched them since. If I have one I won't feel guilty though, because I have chosen to have one and it isn't breaking any rules.
It may be useful to have some high nic juices or nic salt for when you really want a nic hit.
Also, find some juices and a set up that you enjoy much more than smoking.
Pick up so gourmet juices that you can treat yourself to once in a while and have a few setups to keep things interesting.
I hope this helps!