Find background information about your topic. This is where Wikipedia and Google are helpful. Textbooks and course materials are also a good place to find background information. The more you read, the easier it will be to find the right information. Looking up background information can help you form keywords and gives you an idea of what is being talked about in your topic.
"Key Words" are search terms that you need to select for searching in a database.
Research Concept: I am interested in the way water is used and distributed in rural Nicaragua.