Deciding on which database to use will depend on your topic; for instance, if you are focusing on a mental health issue, you may want to include APA PsycInfo or if you are focusing on education, you may want to include ERIC and Academic Search Premier. You can see a list of all the databases recommended on the A-Z database list. Check on the "recommended databases" to the left for some suggestions to get started. At a minimum, you should search in Cinahl and Medline.
Medline Cinahl