How current are the citations in the bibliography?
How current does the information need to be for your topic or assignment
Relevancy
Does the information relate directly to your topic?
Who is the audience for the publication?
Does is provide general background information or in-depth information on a specific topic? Which do you need?
Authority
Who created the information?
What is the author's experience with this topic?
Look for the author's biography or information about the publisher or responsible organization. If there isn't anything in the resource, Google it!
Accuracy
Is the information supported by evidence?
Can you verify the information in another source?
How extensive is the bibliography or work cited list? Can you use these reference to find more information on your topic?
Are there spelling, grammar or typographical errors?
Purpose
What is the purpose of the information? Is it meant to inform you, sell you something or persuade you?
Does it present a fair and balanced view?
Are there political, ideological, cultural, religious or personal biases?
If it's a website, are there advertisements that suggest the information might be biased toward selling a product rather than providing objective information?
Conducting Research Literature Reviews by 
Evaluating Research Articles from Start to Finish by 
Understanding and Evaluating Research by 