Make sure you take the time to evaluate the information you find. Even scholarly journal articles you find using library databases can have flaws. It is important to consider the underlying science behind an information resource before you decide to use it in your research. Think about strengths and weakness of the experimental design, reputation of the publisher, and credentials of the author. Also consider how each study fits within the broader scope of your research. These are just a few criteria to consider when you are evaluating the information you find. Use your best judgment, and don't hesitate to ask your librarian if you're ever unsure about anything.
The video below explains how you can evaluate a scientific research article to determine if it is a high quality source that is appropriate to cite in your own research. A word document version of this same content is also linked below.