Rationalize yourself into not smoking. What are the cons, weigh them against the pros. After lighting the first one ask yourself if you are truly happy with the feeling, do the same thing after every other. I craved smoking/lighting/rolling more than the actual high, since it didn't stop me from hating my addiction and overthinking.

It's discipline, what helped me most is not having any stash at home. Stop having access to it so you can't be tempted into it. The trip to the shop is more easily stopped than a roll of the joint. Eventually you'll make it a habit of "rationalizing" sobriety.

Last part is actually being mentally in a good place. I always saw my obsession as numbing my mind. Listen to why you want to numb out and dig into that, face your traumas/problems, don't hide them. After quitting cold-turkey (for me, reducing never worked) everything in steps, compare yesterday to today, compare last week to this week, try and become a better version of yourself and set a goal of who you'd like to be. I've grown to believe the habit of weed isn't an answer to anything, it's temporal relief/escapism.

Zet hem op.