I know this is a pretty broad question for you attendings out there, but I'm going to ask it anyway. I'm going to be starting as an academic attending in July. Basically I'm looking for advice so I won't make the 'rookie' mistakes I'm expecting to make in my first few years out. 1) What were your biggest challenges as a new attending? 2) What were the biggest mistakes you made? 3) What would you differently in your first year of being an attending, if you could?