This is an article that I've composed based on a previous HN discussion (https://news.ycombinator.com/item?id=21581361) and other discussions on the net.
There are things like cooking, first aid & CPR, setting up a Raspberry Pi, cable management, etc. that you can learn in an hour and can make a meaningful difference in your life. Both article and video mention many topics and gives tips on them.
* Article: (as posted above) https://quanticdev.com/articles/most-valuable-thing-to-learn...
* Video: https://www.youtube.com/watch?v=8F_srpzXQ6o
If you have any ideas, I will add them to the article.