Being a professional media creator of any type you spend a ton of time on your images, music, video, or whatever you may do. Do you backup? Do you store your files off-site? If your house burns down today will you also loose your life's work?
In addition to a media artist I am a digital asset manager and have had to tackle these questions. In a recent discussion on media creator Chase Jarvis' site, he's got it right. This conversation is slanted heavily to Mac users and more pointed at photographraphy and film but I think everyone can take something away from it!