I don't have any data I *really* need to keep, so my backup plans are kind of lax. I have an image of my hard drive on a backup hard drive, along with duplicates of data I would like to keep. If I had data I wanted to make sure to keep, I would probably use redundant hard drive, web based, and for really important stuff DVD/flash memory backup. Amazon and lots of others offer cheap web based storage. (IIRC Amazon is something like $0.25 per GB)