New to Mac / Switcher Tips: Secure Erase
Today's switcher tip comes from Apple Pro's Tip of the Week page, where they discuss how to securely empty your Trash in OS X using the Secure Empty Trash option: "it deletes your file and writes over the drive space where it once lived so many times that agents from top-secret government agencies that we're not even supposed to know exist couldn't resurrect those files. In short, use Secure Empty Trash when you really want your files gone for good."
To securely empty your trash, simply click on your Desktop to bring the Finder to the front. Then select Finder–>Secure Empty Trash from the menu. A dialog will pop open asking if you are absolutely sure you want to eradicate this information. Select yes, and relax. That horrible picture of you with the double-chin is gone forever. ;-)