Here's a few of my favorite stock trading/financial related news sites (feel free to add to the list!):

http://www.marketwatch.com/
http://www.briefing.com
http://www.reuters.com
http://www.wsj.com
http://www.cnbc.com
http://www.bigcharts.com

I usually just check marketwatch.com first thing in the morning; have done so for many years each day - it has a great snapshot of market-moving news and specific stocks to keep on the day's watchlist.

Trade well,

Ken