They are ALL biased, but if you read widely enough and often enough, the biases begin to cancel out, and you will start to get an idea of what the actual facts behind the news are.
It takes a while, but its worth it in the long run. Sometimes the websites that are the most factual are the ones that you wouldn't have looked twice at previously.
After a while you work out which have the most 'propaganda' and which are the most neutral. With some stories, you will find that some news-agencies will try to hide them by not covering them at all - usually the stories that show that country in a bad light.