What makes some Managers great?
Most organizations have leaders that run the gamut from mediocre to outstanding. Do you ever wonder what separates the average from the star performers? Obviously there are many variables to be considered, but one important difference is that some managers stop working on themselves. In an article in the Harvard Business Review (“Are you a good boss or a great one”, Linda Hill and Kent Lineback) zero in on aa key differentiator. They postulate that some managers stop working on themselves. They state that most managers don’t ask themselves the question “Am I good enough?” unless they are shocked into it. 
Could it be that many managers stop growing in their jobs because they don’t know how to? Some fear self development, perhaps because it can make them uncomfortable. I remember working with someone who said after returning from a 3 day seminar on executive leadership that he felt he knew what he needed to know and wasn’t sure that more training was going to help him. I remember thinking that that must be a miserable place to be, thinking you already know all that is necessary! 
The superior managers I’ve worked for are always intrigued by new ways to do things. They realize that you have to adapt because things change.