You have access to thousands of online journals available through Lexis+, Westlaw, and other major journal vendors, which aggregate and index articles and citations.
If you're looking for articles on a particular subject, check for a relevant research guide, which will walk you through the best options for your research.
And if you're looking for a refresher on searching for articles, JSTOR has a great article that walks through the various techniques, which can be used for any database.