You should read biased news sources, only they should include those that espouse the opposite of your preferred bias. If you're left-leaning, keeping up to date

You should read biased news sources, only they should include those that espouse the opposite of your preferred bias. If you're left-leaning, keeping up to date with Fox News is like doing unit testing on your belief system. Likewise if you're right leaning but can put up with Jon Stewart (yeah, I'll go there and call him a news source).