Mindmaps are quick and simple techniques that help you generate ideas, focus them and make connections between them.
Start with a single idea. For example, the topic I'm thinking about researching is global warming.
Next, write down as many related concepts and ideas as you can think of. The app below may be of help.
Keywords will be main ideas in your research question or topic--typically the nouns.
Using the right keywords will speed up the research process; choosing the wrong keywords can bring to the search to a painfully screeching halt.
How does one think of keywords? There are several ways to do this: