I know you're smart. But everyone here is smart. Smart isn't enough. The kind of people I want on my research team are those who will help everyone feel happy to be here.
Not everything needs to be fixed
Apologize when you screw up and focus on other people, not on yourself.
If you have a question, then find the answer.
Everyone has to contribute to the common good. To not do so can be described in one word: selfish.
I was hugely impressed... was the ultimate example of a man who knew what he didn't know, was perfectly willing to admit it, and didn't want to leave until he understood. That's heroic to me. I wish every grad student had that attitude.