During the course of a normal day, a manager has a lot of different  things that we need to spend time worrying about. 

However, using our  manager skills to keep the team that we have onboard is often not one of  the things that we worry about on an average day. However, perhaps we  should be. If we hold off until they are walking out the door in order  to find out why they are leaving, then it will probably be too late.  

What we really need to be doing is talking with the members of our team today in order to find out what we can do to get them to stick around longer.