When you take your first leadership role, or find yourself at the helm of a new team, first impressions are essential to get right. (Sorry to have to add even more pressure to what is already a challenging situation, but the reality is that thanks to the way human brains are wired, impressions are very, very hard to undo.) Come across the wrong way in those early days of working together, and the odds are good that you will be dealing with the negative consequences of that for a long time to come.