I'm busy from the moment I get into the office to the point where I leave at the end of the day. I'm the senior (and only, atm) administrator in my entire building so I constantly have a never ending stream of work to do. I don't work Fridays so you can imagine my distress when I get back to the office on Monday to find fourteen new boxes worth of filing for staff, filing for clientele, shredding, expense reports and data inputting.
Not to mention I also take care of the IT suite which means keeping the system updated, maintaining the network and removing viruses and worms that the less useful people tend to rack up.