Independently verify the source (by performing a separate search) and independently verify the information (through more mainstream news sources).
Select news sources known for high-quality, investigating reporting. Search these sources directly. Don't settle for web search results or social media news feeds. Social media algorithms are designed to present the news that reinforces your current views, not a balanced view.
If you have an immediate emotional reaction to a news article or source: pause, reflect, investigate. Eliciting an emotional reaction is a primary goal of fake news producers.