If you don't know much about your topic, try looking in encyclopedias and books to get a better general understanding. This will also help you discover keywords that you can use when searching. Credo Reference is a great database to use to find encyclopedia articles and definitions.
A "mind map" or "concept map" can be a useful tool for brainstorming your topic. It's a way to visually present a topic that shows how concepts are related, how they build upon one another, and how they might be combined. A concept map can also help you identify keywords to use when searching for information.
The library's Credo Reference database includes a free "mind map" tool to help you generate ideas, and it's interactive to also help you find information related to your topic.
(Click here to view a tutorial.)