Those lists are good places to start. As was stated above, generic duties vary from site to site. The best advice is to be proactive on your systems and dig into them to insure you know how they are set up and running so that when a problem comes up you don't have to spend time looking to see how it was.
And for your backups I cannot stress heavily enough to verify the backups were valid. I knew a site where all they did to verify the backup was to look at the byte count for the tape backup. Then when they had to restore from tape they then discovered that their backups were not any good and they could not restore from tape. From time to time take a backup tape and restore it to a test server to insure that your process is working correctly.
There are 10 types of people in the world:
Those who understand binary and those who don't!