Research begins with the consultation of Reference sources. These works provide concise overviews of particular topics as well as short bibliographies that help expand your research in the best possible direction.
In addition to Wikipedia (which should be used to find potential sources but not cited), the following paid resources might be helpful for brainstorming about a topic.
Annotated bibliographies to a wide variety of disciplines. See these course-specific articles:
Relationships (Sociology)
Social Control (Sociology)
Biological Psychology
Evolution of Cognition