Let's say your topic is "online dating"
Brainstorm: Ask yourself questions related to your topic. What broad subject area might cover "online dating"? For example,
- Which might cover why people use online dating sites? Psychology Guide
- Which might cover how online dating sites are designed ? Computer Science Guide
- Which might cover how dating evolved to eventually move online? History Guide
No matter what your topic is, there is a guide (and a librarian) that can help.