I don't want to be anti-motivational here but here's what happened to me.
I had one of those days recently, and I semi caved in. I had a drag of a friends cig to see what I thought, and surprisingly it was gross. It's happened to me a couple times now, where Ive thought I wanted a smoke until I actually tried smoking again. I've been vaping sweet juices like johnsons creek mint chocolate, and it has made analogs seem horrible.
So maybe I'm weird, but so far the odd taste of analog has only strengthened my resolve to quit, because of how gross they taste to me now lol.. I can safely say I'm done smoking now for good!
I also agree wih trichman, a good strong 24 should easily crush your cravings, if not give you a headrush lol
Good luck and be strong!