My colleagues and I were talking about how we often teach students about keyboard short cuts. We ended up in a discussion about where folks learn these. The obvious is Google, but most people learn them when someone sees them doing something with a mouse or manually, and jumps in with a keyboard short cut suggestion.
Just the other day, I did this. A student was clicking back and forth between programs on their computer. I let them know about Alt+Tab which lets you do that without a mouse. It's a minor change, but once you do it, you'll use it forever.
I love Alt+Tab because it lets me have our reference chat open in one browser window and my other work in another. When I chat pings, I can quickly switch to answer without losing what I was working on.