Accuracy of the Information

Are there mistakes on the website?
Spelling mistakes, grammatical errors, and factual inaccuracies are a good first sign that the information may not be accurate (example).
Does the website have a bibliography?
A bibliography is an indication that the author has researched the information (example).
Are there links to other websites?
Links to other websites will often reinforce the information (example).
Is the website well-organized?
Well-organized information indicates that care has been taken with the website (example).
Is the purpose of the website serious or humorous?
Hoax websites abound on the web and are often difficult to detect (examples in demos 1 and 2).