I invest in my tools and learn a bit more than what I need to make them functional. This isn't always a tech deep dive- sometimes it's just being a "power user" and knowing the shortcuts.

I haven't met a recent grad in the workforce that uses git to its potential. They cargo cult workflows which is a good start but get in to trouble by not understanding just a bit more about how you can make temp branches / rags to keep from destroying commits in a rebase or how to prune duplicate commits from a sloppy rebase.

For terminals - using tmux or screen and understanding how they work enough to pair up on a remote box.

For any language knowing how to debug and how to profile. Understanding that print/println/log debugging is great and just keeping moving when figuring out why something isn't quite right.

This isn't a hard answer to what you asked but it's what popped up in my mind.