Well... to get the best of both worlds (left/right, conservative/liberal) I check out both Drudge Report and The Huffington Post on a daily basis. I also sometimes check out foreign news sites such as the BBC to get an international perspective on things.
http://www.drudgereport.com/
http://www.huffingtonpost.com/
http://www.bbc.co.uk/news/
In my opinion, stay away from Fox, CNN, MSNBC, etc... all are very slanted and narrow in their views.