This is on the periphery of being a tip, but still worth sharing because I think it’s pretty cool and something I’ll bet you’ve never realised.
If you’re used to performing several Command or Option keystrokes in succession — such as selecting all text with Command+A, then copying it with Command+C — you can usually combine them all into one simple keystroke: Command+A+C.
There’s no magic happening here. In this particular case, the layout of a QWERTY keyboard means you’ve hitting Command+A a split second before you hit Command+C. But I’ve been using this tip for a few weeks and it’s never failed yet, which is to say I’ve never hit Command+C first.
Want to bold and italicise some text? Just highlight it and select Command+B+I. There are other examples. If you have any, please share them in the comments below.