Unlike most databases, JSTOR has plenty of content published before the 1990s, but it does not have full-text for the most recent 2-3 years. Articles in all subjects, but especially good for history, area studies, the arts and humanities, mathematics, environmental science, etc. Help using JSTOR.Help creating a permalink in JSTOR.
Know the title of the article you're looking for? Use this tool to search for it (in quotes.) You can also use this tool to search for scholarly articles across multiple databases and in institutional repositories. Help using Google Scholar.
Interactive web site lets you look at different parts of a scholarly article so that you can recognize one when you see one, and know how to take it apart for meaning. From North Carolina State University.