It is possible to narrow your topic too much, making it difficult or nearly impossible to find any information to supplement the point you wish to make. If that is the case, try broadening your topic by:
*comparing or contrasting the topic with another topic
*choosing an alternative topic that is not so recent -- it may not be covered in books and journal articles yet
*choosing an alternative topic that is not so popular -- it may be covered in popular magazines and tabloids only
If you are given the opportunity to choose your topic:
Before starting your research on the topic you've chosen, do the following:
Broad Topic: Global warming
Narrower Topic: How will climate change impact sea levels and the coastal United States?
Broad Topic: Violence on television
Narrower Topic: Does cartoon viewing cause violent behaviors in children under the age of five?
Here's a quick tutorial to help get you started.