Evaluate your information using the CRAAP test. Based on what you discover, go back and research some more.
How new (or old) is the information?
Is the information out of date for your topic?
Does the information address your topic, thesis and supporting arguments?
Is it at an appropriate level (i.e not too elementary or too advanced?)
Who wrote the information? Individual or institution? Are they credible?
Are the author's credentials or qualifications given?
Is there author's contact information?
Is the information consistent with other sources?
Does the information seem biased?
Are there spelling or grammar mistakes?
Why was the information created? To persuade? To educate? To sell something?
Do the authors/sponsors make their intentions clear?
Are there political, cultural, institutional or personal biases and opinions?