Once you have identified some keywords, the next step is to find background information on your topic. Background research:
Provides a good overview of the topic if you are unfamiliar with it.
Helps identify important facts -- terminology, dates, events, history, organizations, etc.
Can help refine your topic.
Leads to bibliographies which provide additional sources of information.
Background information can be found in:
textbooks
dictionaries
general encyclopedias
subject-specific encyclopedias
article databases