If you are finding too much information, your topic may be too broad. Consider narrowing it by:
Smaller piece of the topic:
If you are not finding enough information, your topic may be too narrow. Consider broadening it by:
Broad Topic: Global warming
Narrower Topic: How will climate change impact sea levels and the coastal United States?
Narrow Topic: Does cartoon viewing cause violent behaviors in children under the age of five?
Broader Topic: What are the negative effects of television viewing on children and adolescents?