[giantg2]

If you find yourself doing something that's the same, try to automate it. Stuff like bat, ksh, powershell, etc.

Email folders and filters to sort what is important and what is just noise.

[AnimalMuppet]

Keep a file of "recipes": What's the command to do that build that I only have to do once every few years? What's the combinations of parameters I need to make that command do what I want? And so on. Stuff that you use rarely enough that you don't have it memorized.