I've espoused the doctrine of proactive laziness since I started sysadminnning. I figure I'm doing my very best work when there's nothing that I need to be doing, and I can be spending my time fiddling with the next thing.
That means applying appropriate automation and scripting. (Don't overdo it - not all scripts need to be gold plated).
Decent documentation. (Which is easier: explaining or fixing a problem, or saying 'RTFM' and waving a hand dismissively - if TFM is up to scratch, they won't come back and bother you)
Tackle tasks that'll become a pain, before they're a pain.
The combination of these means I've had a fairly easy and productive live in 'systems admin', because I've never had a need to diddle with spreadsheets to look like I'm working.