I hope that this isnt a silly question but it seems that this hasnt been covered before. About once or twice a month or so I use Backup 3 (from .mac) to backup important items onto 2 DVDs. But what items are really important to backup apart from the obvious ones? I usually set it up to backup iPhoto, itunes, Dreamweaver HTML files and a couple of folders that have important documents. What other items should I backup? Should I backup my library as well? Any suggestions are welcome ! Thanks.