•   Does the site use good grammar and spell correctly?

•   Is it reasonable?  Does it "fit" with other information available?

•   Is it current?  (copyright, publish date, when last updated)
   
•   Are there broken links (that do not work or that link to sites that have been moved) or pictures that don't display?

Here are a few examples of sites with questionable accuracy - even if they DO know how to spell...

•   Geriatric Migration and Time Dilation
   
•   Aluminum Foil Deflector Beanie

Now, use IMSA's 21st Century Information Fluency Project to view more ideas on this subject.  Once at IMSA's MicroModules site, click on "Accuracy" to view that information.

Finally, take a look at some Examples in the light of this information.