Check your sources:
AllSides read the same stories from three different positions
FactCheck by the Annenberg Public Policy Center
Media Bias/Fact Check One of the most “comprehensive media bias resources on the internet”
Politifact Uses a “Truth-o-Meter” to indicate validity of news reporting
Snopes Debunks myths, urban legends, misinformation, etc.
Washington Post Fact Checker Check the facts behind news stories
BS Detector – a plugin for Firefox, Chrome, & Safari