I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.
Elon MuskI think that's an important thing to do, to really pay attention to negative feedback, and solicit it, particularly from friends. This may sound like simple advice, but hardly anyone does that, and it's incredibly helpful.
Elon MuskI feel very strongly that SpaceX would not have been able to get started, nor would we have made the progress that we have, without the help of NASA.
Elon Musk