Use research databases that index, describe, and add subject terms to articles-- all of which makes it easier to find relevant material. The databases often provide the text of the article or a way to find the article through other library sources.
The primary databases for psychology are:
PsycINFO (via EBSCOhost | via Ovid) Most comprehensive tool for finding sources in psychology. (EBSCOhost and Ovid are different companies that supply the same content but have different search features.) Contains citations and summaries of journal articles, book chapters, books and technical reports, as well as citations to dissertations.
Web of Science and Social Sciences Citation Index - Best tools for finding articles in scholarly journals that scholars refer to most. The sources are all selected on the basis of their impact on scholarly publishing, so you can be confident about the quality of the publication. This is an excellent tool for tracking down who has used a paper in their own research. Google Scholar has a similar "cited by" link that leads to a much wider (less selective) set of material. It is interesting to compare results.
Google Scholar is a subset of Google Web Search that searches specifically for scholarly materials such as peer-reviewed papers, theses, books, abstracts and technical reports from broad areas of research. By searching Google Scholar from Temple's library web site through the links above, you will automatically have direct access, both on and off campus, to subscription articles already paid for through the library. Just look for the "Find Full-Text @ TU" link within search results.
Keep in mind that Google Scholar uses rankings that will likely bring up highly cited material that may also be quite old to the top of the results. You can use the year range to limit to more current results (labeled "anytime" towards the top of the search results page in Google Scholar and "Date" in Google Advanced.)
Mental Measurements Yearbook Online Reviews of published tests.
PsychiatryOnline (includes the DSM Library)