Initially I thought that I'd transition to e-fags and climb down from there. Nope. You are trading one habit with another - it doesn't matter if a e-fag cloud is better for you it is still not good and keeps you tethered to smoking. I think it would be quite easy to go back to tobacco if you "allow" yourself to vape as a transition.
I rapidly realised that once I started down the abstinence route I had to be very hard with myself. It wasn't actually that bad in the end. I came up with two mantras that I repeated to myself in my head whenever I really wanted to smoke: they were - "I don't want to smell" and "I don't want to die". They are pretty self explanatory.
I did and sometimes still have dreams about smoking. It is a very insidious habit. I was a smoker for 30 years so it is obviously still a part of my life at age 52 but it is fading and I rarely have to say my mantras these days.
I had another strategy too, which helped in the short term: I started my give up, in the early afternoon of day one (Easter 2018 as it turns out) and had a very long lie in on day two. That got me to over 24 hours with minimal stress. I then progressed to a series of time based targets:
A day (tick), two days ... a week ... two weeks ... (tried a drag on daughter in law's fag - no thanks) ... a month ... two months (weird dreams) ... six months ... etc ... four years.