Ask HN: Saving time in sysadmin

Lately I've found myself too much involved in sysadmin, editing configuration files, monitoring certain things and writing scripts by hand.

My stack is Ubuntu 8.04, MySQL, Apache and Django.

I have used webmin. I was wondering if there are any other good tools out there which can save my time. I have used webmin which I've found really helpful but any other stuff? What do you use for sys admin related stuff?