There are a range of tools available to help you evaluate sources of information. Have a look at some of the links on this page for more information.
Most of these tools ask you to consider the following:
Ask Who, What, Why, Where, When, and How, of all sources of digital information you use.
The CRAAP test is widely used as an academic tool to aid evaluation of sources of information. It was devised by Sarah Blakeslee and widely used at Meriam Library, California State University, Chico. You can find out more about this tool from the links above.