Here are some sites that can link you to news and events about your field. This is not an exhaustive list...these are just a few of the places I go for content.
Browse the websites...or better still, subscribe to their daily or weekly emails.
TVNewsCheck
http://www.tvnewscheck.com/index.php
TVWeek
www.tvweek.com
BroadcastingandCable
http://www.broadcastingcable.com/
Billboard
www.billboard.com
Mediapost
http://www.mediapost.com/
NATPE (National Association of Television Programming Executives)
www.natpe.org AND
NATPE Video Nuze: http://natpe.org/natpe/index.php?option=com_content&view=article&id=286&Itemid=449
National Association of Broadcasters
www.nab.org
Advertising Age
http://adage.com/
Brand Week
http://www.brandweek.com/bw/index.jsp
Any major newspaper:
The New York Times
www.nytimes.com
The Los Angeles Times
www.latimes.com
The Wall Street Journal
www.wsjonline.com
(Some of the WSJ content is available only to subscribers.)