I was surprised to see a few tips make this list, however. The first: Check for viruses. "Macs don't get anywhere near the amount of viruses that Windows PCs are prone to, but that doesn't mean that they can't get infected," reads tip #8. I guess the guys who wrote this article didn't get the memo from the team who made the "Macs don't get viruses" TV commercials. The other odd tips deal with Mac maintenance stuff, like repairing permissions and defragging your hard drive. I was under the impression that, since Panther, Mac OS X defragged itself. On the permissions topic, there has been a lot of chatter over the last couple of months about whether repairing permissions is actually useful. Just check out the pseudo-series John Gruber had on the topic.
All in all, I think I was actually a little frightened by evidence of even cheesier one-liners making their way into Apple's support docs: "As a Mac user, you won't have to do windows, but you will need to do some housekeeping!" Yuk yuk.