1. Carry it around every day. A lot of people who are invested in what little space there is in their pockets make room for a pocket knife. Pocket Dumps, Everyday Carry.
2. Be wholesome. Mumbelty peg is a game of knife feats. It’s competitive and skill-driven, and the loser is punished heartily by having to pull a peg out of the ground with his teeth. The American Boy’s Book of Sport has diagrams of the knife-flipping tricks one must accomplish in order to be crowned winner.
There are other variations of mumbelty peg, including an ill-advised one that requires a pair of duelers with more stupidity than skill. The one who throws a knife closest to his own foot wins. Stick your own foot and you win automatically.