It is amazing how much content that was only available to me as a student by browing the stacks and periodical archives in the university library is availabe for free over the internet. This changes research methods dramatically. I don't need to be located close to the campus anymore.
For example here is FreeFullText, a list of all the journals whose content is available for free on the 'net.
FreeFullText.com provides direct links to over 7000 scholarly periodicals which allow some or all of their online content to be viewed by ANYONE with Internet access for free (though some may require free registration). The issue(s) which are available for free are indicated for each title on the alphabetical periodical lists. The design of this site is optimized for users seeking specific articles for which they already have the citation. If some of the articles you need are not available for free online, you may obtain them for a fee through a document delivery service, such as Pinpoint Documents. If you wish to "search" for articles on a particular topic, please use a bibliographic database such as PubMed. This site does not attempt to list ALL periodicals on the Internet, only those which offer free full-text content. Titles will be removed from this list if they cease to offer any free full-text content.