Identify the important nouns or main ideas in your research question.
Generate synonyms for each main term, along with words that are narrower, broader, and related.
Start searching and modify your keywords as necessary.
Tip: Keep in mind that keywords are tricky, they will evolve and you'll likely come across better ones as you begin searching. The more you search and learn about your topic, the easier it will be to develop keywords.
Watch this video from the University of Houston Libraries to learn more about this process: