Resource: We the media: grassroots journalism by the people, for the people (2004) and Mediactive (2010) by Dan Gillmor. We the media is part of O'Reilly Books Open Book Project. Both are manuals and descriptions of the emerging phenomenon of "grassroots" or "citizen" journalism. Business and technology writer Dan Gillmor's books shed some light on the changes that journalism is going through in the 21st century. Each chapter of We the media is downloadable as a separate PDF. Chapters of Mediactive are available as posts on the site, and are undergoing revision (Mediactive 2.0). It is also available as a PDF.
Additional info: The Mediactive site includes additional resources and tools.