It didn’t involve memory techniques, but the way I quit coffee was that my cholesterol was high. I learned that coffee can increase cholesterol levels and that tea can lower them, so I immediately switched to tea. (Between that and changing my diet I was able to lower it by 28 points in 4-5 weeks.)
There’s less friction than with making coffee, because I don’t have to grind coffee, so that also made the switch easier. I got this tea thing from IKEA — I put one teaspoon of tea in it and let it sit for 3 minutes.
To keep it interesting, I go to a local health food store that sells bulk teas. That makes it easy to try different kinds of teas.
I feel like it’s less addictive than coffee, and if I wanted to quit tea, it would probably be easy to switch to herbal tea (or stop) without really noticing. For me, it’s more about routine than what I’m drinking. Discipline and consistent routines make me more productive. I actually don’t really like the taste of coffee or tea. 
Related discussions:
Update: I’m going to update this post because I did start drinking coffee again after a while. Drinking tea on an empty stomach started to cause severe nausea. (I experiment with intermittent fasting, so I felt like I had to choose one or the other in order to maintain the psychological tricks I play on my brain to maintain any discipline.)
My cholesterol went back up for a while, but I just did another test and now it’s back down even lower than before (still a bit above normal, but not dangerously high). I can’t be sure exactly what did it, but I wonder if it might be a combination of intermittent fasting (periodic feeding, between 20:4 to 16:8 depending on the day), daily salad, and avoiding restaurant food as much as possible.
(This is all just anecdotal.)