On what subject(s) are you an authority?
I’m not going to insult the integrity of the prompt by pretending to be an authority on any particular thing. I’ll just say that by keeping my mouth shut in many a situation, those around me have concluded that I’m wiser than I am.
Works 
Yes, keeping my mouth shut worked for me too. People wondered what deep thoughts I was having, when all I was thinking was what to make for dinner that night!
Haha, I believe it! My father passed those words of wisdom to me as a young man and they still hold true.