Try showing a total (but interested) beginner how to make a nice sound on the A and D strings. You’ll realize quickly how much you know, and how much other people are impressed with what you know. I had this experience recently, and it was more successful than my first attempt at this. My friend was able to get decent tone after a few tries. But it was not until she sat down that I realized how much I needed to explain that I had taken for granted. Even though my bow hold is far from perfect, explaining a basic bow hold was an enlightening experience.

Remember: “To teach is to learn twice”