I’m sure most Mac users know Command-C means copy and Command-V means paste, but there’s a host of other useful shortcuts that make a Mac user’s life much easier. I’ve assembled this short collection to illustrate this truth:
Esc
Never underestimate the power of the Esc key to get you out of trouble. Say you’re taking a screen shot and managed to select part of your screen for that shot, only to discover it’s the wrong part – tap Esc and you won’t need to worry about it. That’s basically the principle of Esc. Use it to cancel a previous command. Another example: Web page won’t load and is sucking up your system resources?
Click here for original story, 28 keyboard shortcuts Mac users need to know
Source: Computer World