Use encyclopedias to:
Encyclopedias contain quick facts and topic overviews, but are typically not used as sources in papers because they are usually too general in scope.
As you find information related to your topic, write down key words and ideas you come across, including:
Synonyms and related terms
Arguments for and against your topic
Names of people
Names of organizations
These are your KEYWORDS; you will likely continue to find more keywords as you do your research. You will use these terms to do more effective searches.