Thanks to Snaggy and Nitrozac for this Joy of Tech comic identifying 12 of the most annoying types of Twitter users - we promise to think before we tweet! follow link
Use Expose to Open Files Quickly
Looking for an easy way to drag a file into a hidden application? First enter Expose's All Windows mode by hitting F9, then hover over an application's window while dragging your file, pause for a moment (or press the Space bar) and that window will spring to the foreground enabling you to open the file within that application.
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How Not to Use Twitter, by the Joy of Tech