Here are some things to look for when you're evaluating a Web site or a source other than an article found through a library database, book, etc.
Simply speaks to the recency of published information.
Locate the author of a publication, Web site, etc. Is he or she qualified to speak on a given topic?
Sometimes a sponsor will have a hidden agenda. This is something that I learned when looking for the Center for Consumer Freedom (CCF) in SourceWatch.
Ties in with authorship and sponsorship. What is the intent of the Web site or publication?
Hacker, Diana, and Barbara Fister. (2009). "Tips for Evaluating Sources." Bedford/St. Martin's.com. Bedford St. Martin's, n.d. Web. 19 Aug. 2011. Retrieved from http://www.dianahacker.com/resdoc/tips.html.
Quaratiello, Arlene, and Jane Devine. The College Student's Research Companion : Finding, Evaluating, and Citing the Resources You Need to Succeed. New York: Neal-Schuman, 2011.
Website Spoofs - http://www.sree.net/stories/feline.html