Librarian's Ultimate Guide to Search Engines Has Tips for Everyone
Scott Hawksworth over at DegreeTutor has created a very useful guide for online research called the Librarian's Ultimate Guide to Search Engines. It covers "things librarians understand about search - and things that anyone doing online research can benefit from."
These things include discussion of where search engines are and where they are going, a glossary, advanced search tips, and a description of some of the players - big and little - in the search market.
This guide has something for everyone - from novice searcher to expert researcher.