Sometimes law review articles can be one of the best places to find current research on your topic. These sources can be used to find journal articles. Although there is a lot of overlap on Lexis and Westlaw, unique articles can be found in both databases.
Indexes
Indexes are the best way to begin your search because you are searching just subjects, titles and authors. For broad topic research-- this will lead you to the essential law review articles on a topic.
Full Text Databases
Google Scholar
SSRN