Formal Logic. Please, can this be a full k-12 course like English and Math? Just learn to think, analyse, and correlate ideas in ways that are communicable. Learn what the logical fallacies are and how to avoid them. Train a functional bullshit detector. This world would be so much better off if the bulk of the population could understand what a confirmation bias was. As much as I hate to link to a Grammarly blog post, it gives good examples. Obviously all of it needs to be made age appropriate, but we never bother to actually teach people how to think, we just expect them to know and that has not been working out too well.

• Install a well anchored level shelf.

• Plaster, sand the holes and repaint when you remove the shelf.

Very basic tools, very easy techniques, yet mind blowing how many people don't know how to do these things.

Sewing. I've saved a lot of shirts putting buttons back on and fixing holes. You can also do your own alterations on clothes but I'm not brave enough to try that yet.

CPR, first aid, basic self defense.

Learn a dance or two nothing too complicated but being able to bust out a dance at a wedding really impressed everyone.

First aid.

sewing with a needle and thread. nothing complicated, the bare minimum is useful in a lot of ways.

i keep a small kit in my car because my pants waistlines keep shrinking mysteriously and i'm starting to randomly lose buttons and getting blowouts in the crotch. [likely due to far-reaching, nefarious, conspiracies and not b/c of the other kit in my car that's full of snacks].

what used to be my crippling, irrational fear of inadvertently exposing myself at like a job interview or in an uber with a cute driver, is now an easy fix i can do in a minute AND it's certain to make an impression.

old winter jackets with a lot of zippered pockets are especially great practice. try unstitching and removing a few of the pockets, then add them to other jackets or whatever you can think of.