Authors will benefit by understanding their rights and negotiating with their publishers to retain rights. Such rights control the availability of the work to others as well as the author's right to use the work in his or her own classroom, website, etc.
Describes the SPARC Author Addendum to secure your rights as the author of a journal article. Provided by the Scholarly Publishing and Academic Resources Coalition (SPARC), 2006.
Author's Rights, Tout de Suite, by Charles Bailey (2008) is a very readable explanation of how authors can retain and manage copyright of their journal articles.
“When you publish a book or a paper, many publishers will ask you to transfer all copyrights in the work to them. But that is not always to your advantage....” This site includes sections on "What Authors Can Do" and "Sample Copyright Agreements" and is provided by the Copyright Information Center, Cornell University (2009).