Who?
Who wrote the article/book/information?
What are that person's credentials?
Which organization is publishing the work?
What?
What is the purpose of the publication?
What information does the author present?
What information isn't presented?
Where?
Where can I find more information about the topic?
Does the article have citations that I can follow to find more information?
Where does the information in the article come from?
When?
Is the information presented current?
Has the information been updated recently?
Why?
Why is this information better than other available sources?
Why does this article support or undermine your research hypothesis?
How?
How does this relate to what you already know?