Mary Ellen Bates gives phenomenal search tips for the various search engines (e.g., Google, Yahoo, Bing)! Rather than trying to give you notes, go and get her presentation which will be available at http://www.batesinfo.com/extras/. You also may be interested in some of her past presentations.
What strikes me is how the Internet search engines continue to add features that help people do better searches, yet most people don't know about them (or use them). Which is why people should take a class or workshop on effective search techniques (hint...I'm teaching a class on this at SU in the fall). The other things that strikes me is that some of these features are what we (librarians) use in fee-based services...especially those services that have not dumbed down their search interface.
BTW have you heard of DuckDuckGo.com or Blekko? Yeah...this is why Mary Ellen rocks.