Watching this video will help you to make sure you use good sources. It's very silly, but actually pretty good. And it's short :)
When evaulating Internet sources, ask yourself the following questions.
Source and Authority
• Can you easily identify who wrote the information and their credentials?
• What more can you learn about the author or institution affiliated with the page? Look for a biography or “about us” section.
• Can the information be verified through its bibliography or footnotes?
• If online, what does the domain or URL tell you about the authority and interests of the source of the information? (.gov, .edu, .org, .com, etc.)
Scope and Content
• What is the scope or coverage of the information: Is it brief or in depth?
• Is it written for a popular audience or is it more technical and scholarly?
Purpose and Relevance
• Is it written to inform, explain, or persuade?
• Can you discover any bias to the perspective of the author?
• Does it relate well to information you found in other works?
Timeliness and Accuracy
• When was the information created or last revised?
• Is it up-to-date and accurate?
• Overall, is the information valid and current for the given topic?