From O’Grady’s PowerPage:
I have no interest in true hacking (i.e. rummaging through people’s private junk) although viewing random unprotected IP cameras around the world in public places and controlling their panning and zoom functions is kind of mind-blowing. There are a ton of fun GHacks out there – like spelling out words in pictures using Google image search, and the Google poetry generator, or the news map generator etc. Check out more than a dozen Google Hacks here.
Sort of related: put an “&btnI=I%27m+Feeling+Lucky” at the end of your query URL to invoke Google’s “I’m feeling lucky” option. This is incredibly useful when using Google to search WorldCat, like this.