One of my first management mentors taught me that my job as a manager is to make sure I have no work to do (and that it takes a lot of work to get there ....),

One of my first management mentors taught me that my job as a manager is to make sure I have no work to do (and that it takes a lot of work to get there ....), and I adopted this philosophy wholeheartedly. If I, as a manager, cannot take a month off at any time (after e.g. a year at a job, and with no highly improbable events occurring recently), I consider that my failure.