You may find a number of articles and other resources related to your topic. It is important to filter what you find so you are not overwhelmed with information. R-A-T-E each source:
R - Is this info Relevant to my topic? If not, discard!
A - On what Authority is it based? You will want to consider a variety of viewpoints from various experts.
T - Have I already Taken this? Is it a duplicate of what you already have from another source and if so, which source is preferred?
E - Do I need Everything or just part? You may refer to an entire article, for example, or you may be pulling only a few statistics, ideas or quotes (with proper attribution).