The worst media organisations are those which pretend to not merely be impartial, but 'unbiased'. No one and no organisation is unbiased. Everyone has an agenda. I would much rather take my information from media sources which are open about declaring their biases. This was, in fact, precisely how newspapers functioned for many years.
The great thing about the internet age is that we are seeing a return to this style from the new media - and why shouldn't we? If you believe that your worldview is right, then you should put that argument forward and let people who disagree do so through their own publications.
Yep. Find reliable left and reliable right and make your own mind up. I think GUMBLETRON said it earlier in this thread. Follow individuals and small organizations who actually live and die on the accuracy and quality. No large media organisations (though there are a few individual shows and journos in the larger organisations who are reliable).