A dedicated, exclusive office. When I'm not in the building, I still don't want my office space being used by someone else. As far as I am concerned, I need to

A dedicated, exclusive office. When I'm not in the building, I still don't want my office space being used by someone else. As far as I am concerned, I need to have a dedicated exclusive work area that is used only by me when I am physically present, and used by no one when I am not.