Start looking for sociology articles in Sociological Abstracts
Other places to look include
Pro tip! When you find a good article, click to get the online PDF. If Berkeley doesn't have that journal, use "interlibrary loan" to request that we borrow it from another library.
Annual Review of Sociology summarizes the current literature on a topic like theories of the causes of poverty, or social networks and health. Start here before your literature review to learn which articles to cite.
Other most-cited journals in sociology are:
Another place to look is the American Sociological Association's publication Contexts, which is "the public face of sociology". There are some good introductions here to themes and topics that are current and in the news.