Consider the Source - Know who is responsible for the content.
Focus on quality - All Web sites are not created equal. Does the site have an editorial board? Is the information reviewed before it is posted?
Look for the evidence - Rely on research, not opinion. Does the site identify the author? Does it rely on testimonials?
Check for currency - Look for the latest information Is the information current?
Beware of bias - what is the purpose? Who is providing the funding? Who pays for the site?