These are some of the organizations that may be useful to you as you begin a career in communication arts. Many organizations also have discounted member rates for students.
National Communication Association "studies all forms, modes, media, and consequences of communication through humanistic, social scientific, and aesthetic inquiry." - from website
The Society for Cinema and Media Studies is dedicated to promoting an understanding of film, television, and related media through research and teaching.
"The Public Relations Society of America (PRSA) is the nation’s leading professional organization serving the communications community." - from the website