Currency: How old is the information? When was it last updated and by whom?
Authority: Who is the author? What is their knowledge base/qualifications? How have they cariied out their research?
Intent: What is the purpose of the information e.g. financial gain, propaganda, academic etc?
Relevance: Is this what I need? Will it answer my question? Is it at the right level?
Objectivity: Balanced view? Opposing views represented? Links to supporting information?