In my video I will cover how to use an external hardrive (or jump drive- which is smaller but works the same way) and how to burn a cd/dvd. Online backup services are also available- but these would be specific to the service you choose, so if you go this route just follow the instructions given by your site.
I plan to keep one of my external copies on a hard drive that we keep at our home... the same one I make backups of all my photos too. The other copy I will make will be on dvd (they hold way more than cds) and storing them at my folks house- in case my computer and our external drive are taken out by the same catastrophe.
I hope this helps you out! Flutterby again soon. I've got a special backup segment for the program files (as opposed to the content files) coming next week.