Writing requirements is hard, and error prone. Using EARS can help to make better and more complete requirements. This video explains common requirement problems, and how you can use EARS to mitigate them. 

Additional Resources:

• The original paper by Mavin et. al: Easy Approach to Requirements Syntax (EARS)
• An interesting "review" article: "Ten Years of Ears"
• Aalto's Cheat sheet / Quick Reference Sheet.