One of the most common requests we see at the reference desk is "I need information about X."
That "X" is generally a broad and undefined topic that can be tackled in numerous ways. This is where brainstorming comes into play.
When brainstorming you want to consider:
I like to recommend that students keep a list of information as they think through these questions. Then, they can develop a mind map to help connect ideas, themes, topics, and examples. Using brainstorming can make it easier to develop a strong research question and find keywords for searching.