I quit 20 years ago, I used 1 approach, I quit. I had made up my mind if I said I was trying to quit I was implying to myself and others that there was a chance of failure. I bought 3 Lbs of modeling clay. 26 board foot of oak & 8 ea. 10' sticks of 5/8 square stock steel. I also bought a giant bad of jolly ranchers.
Between woodworking, Blacksmithing and playing with clay I double dog dared anyone to talk to me for 3 days.
3 days turned into 3 weeks, that turned into 3 months. 20 years later I am glad I kicked Mr. Viceroy's butt to the curb.
Last summer, I threw away the pack that set in my jewelery box unopened all those years.