Liberal? Conservative? This guide by Valparaiso University provides different sources to examine bias major news outlets; additionally, this guide from Bowling Green State University is also quite helpful.
Is an organization mentioned in relation to an article? Think tanks, associations, and other organizations usually exist for a reason. Learn more about the organization to identify potential biases.
Are all biases bad? No. But being aware of them helps contextualize the information presented.
After publication, an article can be corrected or even retracted (although this is rare). There isn't a widely accepted system to communicate these to readers. Sometimes the best way to find this information is on the publication's website, rather than in a library database. You may also find dissenting opinions or corrections in response articles, letters to the editors, or opinion columns. These are some things to look for:
Searching for reliable political or news information can be frustrating, especially when deciding which source to use (and believe!). The Libraries do have some databases that can also help along with your search - I would recommend using these databases to search for information about current news and information.
The Internet is an uncontrolled, unorganized mish-mash of excellent scholarship and incoherent musings. Fortunately there are some simple ways to focus in on the good stuff! Below are some strategies to try in Google: