Take some time today to really get acquainted with one specific tool that you use frequently. Poke around the menus and help files, search Google for “ tricks” and see what comes up. I think you’ll be surprised by what you find.
Excellent advice from Brett. I too am guilty of only using a few specific features of an application and not really diving in and really getting to know it. And while there are certainly some apps that are so deep you could spend years fully learning them, even those might be worth a least a half hour of time investigating just one thing that could change your game.