20 skills to learn in 20 hours
Supposedly, it just takes 20 hours to learn the fundamentals of a skill. Or something like that. According to some TED (or TEDx) talk and some people on the internet.
Let's think of some skills you could learn to an okay level in 20 hours. I'm mostly just assuming here.

Preview
1. Krav Maga
The idea is that you should know how to defend yourself within a few months
2. Ukulele
As demonstrated in that TED talk I vaguely remember.
3. Bachata
I guess? I heard it was fairly easy.
4. Joke writing
5. Coffee stuff
6. Roller-blading
7. Website building
8. How to use a PC / Mac / whatever
9. Surfing
10. Blog writing
11. Idea generation
12. Toki Pona
A constructed language with something like 120 base words. Haven't tried it myself.
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