I know with windows, it likes to go nuts when you're idling, and I was just wondering if there was any sort of similar maintenance tasks that I should be concerned about with Ubuntu.
I know you don't have to worry about fragmentation with Linux (due to ext2/3), and I was just wondering if there was anything other common maintenance tasks that would be pointless for Ubuntu or Linux in general.
/etc/cron*
. They are used to perform (pseudo-)periodical (maintenance) tasks like checking for package updates.