Another skill my wife wishes I would learn:
Don't put it in the dirty dishes until the prep is done.
She gets annoyed at how it takes me 16 forks to make scrambled eggs, bacon, and toast.
Anyway, I'd add this 3-hour-and-18-minute video as essential to a learning cook's viewing:
View: https://youtu.be/CshkecuFfMc
It's Jacques Pepin demonstrating technique after technique after technique; everything from how to tie your apron (yes, there's a way to do that, and a reason behind it), to deboning a chicken, to clarifying consommé, and a hundred other things.
What is obvious is that everything comes from having trained his entire life in restaurants - everything is done in the most efficient way possible. Even trimming a potato, there's a way to do it that, applied over a hundred pounds of potatoes, is a great timesaver.
Honestly, I have the attention span of a gnat, and I've watched this twice in the last month, and the time just flies by. He's a natural teacher, and I think he's inspired me to serve my food with butter roses.