A Tutorial on Advanced Searching - http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/FindInfo.html#Outline
Put out by the University of California at Berkeley, this is a helpful in-depth tutorial on how to approach a search on the World Wide Web. It is well worth the time to go through it step by step.
How to tell if you are looking at a great web site - http://www.pla.org/ala/mgrps/divs/alsc/greatwebsites/greatwebsitesforkids/greatwebsites.cfm
Definitely not for kids only, the American Library Association's outstanding Guide to Cyberspace for Parents and Kids presents solid guidelines for evaluating the content of a web page.
Search Engine Watch - http://searchenginewatch.com/
This commercial site specializes in investigating and analyzing the major search engines. If you're interested in knowing more about how search engines work, which are the more popular, and how big their indexes are, this is the place to go.