I wouldn't say you've got too much to worry about unless you're the next Ron Jeremy looking for a stage..
I'm a backup nut. I have a raid 5 set up on my home server so that unless all my hard drives die at once, I won't lose anything. I have copies of the super important stuff on an external hard-drive too.
I copy my hubs and save them on my computer..just..because they're mine :) I wrote them, I'm proud of them, and in the event I can't get access to them at the exact moment I want to see one, I have them here :) For instance, at Christmas I wanted to show one to my Nan, but her internet was down. No problem!