When I was a kid, installing a big computer program involved hours of tedious work involving a dozen or more floppy disks and a computer incapable of doing two things at once. Learning economics is sort of like this. The lectures are floppy disks, and between loading each one, you (the computer) have to think about what you’re getting in the lectures to integrate it into your brain. Study skills are about making this process more efficient–finding the best way to take information from books, videos, and lectures and internalize it.
The Study Skills playlist covers a good range of important topics. The host has his own YouTube channel that goes into greater depth.
The Crash Course YouTube channel is a useful resource in its own right (I really like the history and computer science playlists). I’ve only watched a few of their econ videos and was mostly impressed (nothing’s perfect, but my personal preferences lean towards Cowen and Tabbarok).