Relevancy

Ask yourself

How relevant or pertinent is the information to my research?
Is this source appropriate (on target) for my research?
Is it something I can use?
Does it provide enough information or detail?

Suitability

Ask yourself

How suitable is this resource for me?
Do I understand what I am reading? 
Or is it too sophisticated or advanced? 
Is this written for a layperson or student such as myself?  Or was it written for a professional or expert in a specialized field?

Currency

Ask yourself

How current is the information?  Is that important?
When was the item published? 
Does the publication date matter in terms of my topic?  For example, one of the best resources we have about the assassination of JFK is a magazine article from 1963.

Authority

Ask yourself

How reliable is the information?
What kind of authority does this writer have? 
Is there any information available about the author?
Does he / she have a  Ph. D.? Has she / he written other books or articles on this subject?  Is she / he an expert on this topic?
Has a recognized editor/publisher been involved in the publication process?
Is this an appropriated source for valid information on your topic?

Objectivity

Ask yourself

How balanced if the information?
What is the author's purpose in presenting this information?
Is the information free from bias?
Is the information backed by facts or is it merely opinion?