"If you want to know how much you'll be missed when you're gone, put your finger in a bucket of water and then remove it. The hole that's left will be how much you are missed."

No one is irreplaceable. No one. Not even this guy. Instead of being depressing, the thought that you're professionally replaceable is liberating. You may not leave a hole, but you can leave a mark on a person, a team, or a culture that lives on after you're gone.

You may not be missed, but you can be remembered--in the best possible way.