I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.
Drawing is rather like playing chess: your mind races ahead of the moves that you eventually make.
Filmmaking is a collaborative art form, and the best films come from a team that is passionate and committed to the story.