Following is a short list of links to helpful organizations:
American Library Association
http://www.ala.org
Special Libraries Association
http://www.sla.org
The American Society for Information Science and Technology
http://www.asis.org
Society for Technical Communication
http://www.stc.org
ACM SIG for Design of Communications
http://www.acm.org/sigdoc
Usability Professionals Association
http://www.upassoc.org