You will save time. effort, and midnight misery if you keep track of your research from the beginning. This guide is not the last word on the subject; you may come up with a system that works better for you, but do use some system, for your sanity's sake.
Comprehensive scholarly, multi-disciplinary resource containing a large number of peer-reviewed journals.
This is good place to start for most topics, including all sciences, religion, law, history, psychology, political science, criminal justice, literature, current events, sociology and communications. Abstracts and full-text for most journal articles; Varies by title many from 1980s-present