Three Kings, to DivX using SmartRipper, DVD2AVI, BeSweet & VirtualDub (using a guide from here of all places). Took about a day to encode too at awesome quality. Man we've got it easy these days with Shrink and so forth, DVD burners were unheard of back then...
The first one I backed up was a Wiggles DVD. My little girl had scratched it so bad that none of my DVD players would play it and it was one of her favorites when she was 2 yrs old. It was still readable in the PC so I was able to make a backup.