Also check what your users are doing. We had a customer whose clerks deliberately switched off their machines at the wall without shutting down, several times a day, because that was the quickest way to make their machine print- there was a network misconfiguration causing machines to walk their entire WAN looking for a printer a few feet away.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
