The objective of any great executive is to attract and retain the best staff while letting the incompetent to exit. It is easy to attract incompetent staff and very difficult to get rid of them. Likewise, when you get the best on board, keeping them is very tough. For this reason, you must always ensure quality at the door and have a continuous process of identifying the best folks and doing all it takes to retain them. True, no one is indispensable. But there is always cost in terms of learning curve when you lose a good staff.  Now you’ve…