Good set of comments. The advice that has rung true with me is letting go and trusting your peers. Having been micromanaged on everything that I do to the point of being a photoshop (sketch/illustrator, name your poison) conduit I would say trust is the biggest thing. If work fits the brief, forget how it's done and don't let personal opinion get in the way. You are there to make sure things are done on time and within budget, if you start having exaggerated creative input then it's a slippery slope of alienation and resentment within your team