The Four Moves
Check for previous work:
Check to see if someone else has already fact checked the claim or provided a synthesis of the research.
Go upstream to the source:
Try to find the source of the claim. Get to the original source and attempt to assess the trustworthiness of hte information.
Read Laterally:
Once you find the source of the claim, read what others are saying about the source.
Circle back:
If you find yourself going down a confusing rabbit hole, back up, and start over. You may make better and different decisions with the information that you have gained.
The Habit
Check Your Emotions:
When you feel a strong emotion that pushes you to share a "fact" with others. Stop. think. Fact check. Things that appeal to emotions such as happiness, anger, pride or vindication can override your desire to analyze.