Here's some tips that helped me, 3+ years ago:
Drop the cigs altogether - you're torturing yourself and if you're gonna have withdrawal best to get it over with. Some of it is chemical dependence, but as you're getting your nicotine a good bit is psychological habit. How?
*Vape like a fiend every time you want a cigarette. Chain vape and use high enough nicotine. You're literally replacing one habit with another; go for it and think happy, healthy thoughts.
*Find threads that you like in ECF and read them obsessively. Juice threads helped me slide the nic association from smoke to vapor flavors - you'll find that the nic reward reinforcement naturally slides that way, but it helps to encourage it. If you love gadgets and toys, read the modding pages, whatever.
*Invest. We stick to what we invest in. Reward yourself (withing your means) for your intelligent choice by buying interesting juices, equipment, pretty drip tips, whatever. Don't go broke but this is a time for a little encouraging self-indulgence. Watch for vape-mail with enthusiasm - you're reshaping a very stubborn set of reward-anticipatory responses. Be ridiculous. You can rein in later.
*Turn your mind from internal complaints and negativity to positive, proud, relieved, excited thoughts. Our minds create a lot of our experience of reality. Be brief and firm with the inner whiney 2 year old who really, really, really, puhLEEZE only wants one cigarette. Redirect him.

Feel good about that, you're parenting yourself wisely. Positive thinking can sound cheesy and shallow but it's powerful stuff - mind mastery, really.
*Minimize any suffering. It's not nice when others do this, and they shouldn't, but if we couldn't do this ourselves we'd be pretty pathetic. The worst trap in overcoming any habit is internal drama and obsessive, hyperbolic fixation on fear and discomfort. And honestly, especially if you bag those coffin nails, it almost always and quickly becomes easier, and then no difficulty at all. A joy.
*Don't look back, except to create an aversion to the awfulness of smoking cigs. Create one, amplify the one you've got. Yuk, ugh, disgusting nasty things. Notice what's distasteful, don't gaze longingly at those smokey huddles standing in the rain at break. Bag that stuff.
*Vape, vape vape. It's perfectly OK to live to vape for a while - successful new vapers are so into it that no one can stand us but us. Have fun!
I smoked 3-4 packs a day for decades. And the usual spiel - nothing worked, mom died of lung CA, I kept smoking, wheezing and basically killing myself, discovered ecigs serendipitously, not one cigarette since and man, do I ever not miss 'em. Not one single brief pang for years; the thought makes me ill. And I feel wonderful, love vaping, so hang in there, and we're all with you, OK?