Invert desktop colors

Press CMD-OPT-CTRL-8 and the colors on your screen will be inverted--white pixels turn black, blue turns orange, etc. This seemingly useless trick is actually an accessibility feature, and can be helpful in bright-light situations, but we all know it was really implemented to let geeks prank their unknowing friends.
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Talk to me, Terminal

In Spotlight, type "Terminal" and hit Enter. Here, type "say" followed by a word or phrase. Useful? No. Awesome? Yes.
Photo by: Screenshot by Sharon Vaknin/CNET

Slow-motion minimizing

Hold the Shift key, then minimize to escape into a moment of life in slow motion.
Photo by: Screenshot by Sharon Vaknin/CNET

Zoom in anywhere

Mouse over the part of the screen you want to magnify, then press option while scrolling up (two fingers up on the trackpad, or with the mouse scroll wheel).
Photo by: Screenshot by Sharon Vaknin/CNET

Play retro games in Terminal

Go to Spotlight, type "Terminal" and hit Enter to launch it. Then type "emacs", and hit Enter. Once the new screen loads, hit Esc, then type "x" followed by "tetris," "snake," or "pong." Enjoy!
Photo by: Screenshot by Sharon Vaknin/CNET
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