As you can surmise from my previous post about digital cameras, we take lots of pictures. We got our first digital camera in Dec. 2002, and have gone through several since. And we've accumulated over 23,000 photos. And I can't throw any of them away. OK, I guess I can part with the odd blurry shot, or "oops I didn't realize the camera was on" picture of the sky or ground. Other than that, I keep'em all.
Part of my reasoning: you never know when you might want that picture of the yard before the deck was built, or that photo of the left-side of the van to see if that dent was there last April.
We capture about 2GB of photo data every month or so. That means our photo/video archive is a stack of DVDs that looks like this...

Oh, I can hear the sirens. They're coming to take me away!