What are some underrated skills that can significantly improve your life if mastered?

Darning

Fire starting without another fire. e.g matches, lighter

Hunting the wily deer, out of season, without getting caught

breaking the law, secretly

Efficient Wet Work exerted on politicians, trillionaires, and other FASCISTs while in possession of an iron clad alibi, or even better, never even a person of interest.

Personally, learning to swim in still water, and the seas

doing cartwheels seamlessly

persuading the sultry, beautiful girls the you are very very cool

Baking like a really great pastry chef

Killing and Gutting chickens