All about Public Relations
Lots of "how to" articles, as well as articles on ethics, media relations and crisis management from professionals in the field.
Bulldog Reporter's Daily Dog
This "leading source of PR news, views and tools" includes free white papers, articles on "New Tools and Technology" and examples of "Winning PR."
Cision -- Resources
Best practices, tip sheets and white papers from Cision, a media intelligence and information services company. Resources are free, but registration is required.
Council of Public Relations Firms -- Resources
Includes case studies, best practices and research to promote public relations.
The public relations page of this online version of the print publication Entrepreneur provides links to articles on getting press, PR basics and public speaking.
Institute for Public Relations
Find research on various aspects of PR, including measurement and evaluation, media relations and new technologies.
Public Relations Tactics and Public Relations Strategist (Public Relations Society of America)
Search news releases, blogs, and podcasts, as well as online versions of Public Relations Tactics and The Public Relations Strategist, which contain a good number of articles available in the original print publications.