I've heard rumblings about this tip for a while now, but I was too scared to try it myself. But I've seen and heard recommendations for it all over the place, so here goes. Though most scratched up CDs make me want to just throw them out, it turns out they just might be salvageable . . . with toothpaste!
Simply rub toothpaste on the scratched surface with a cotton swab until the scratches have disappeared. The paste fills in the scratches so the disc can be read. It may not work for heavily scratched surfaces, but it's worth a shot.
I'd try this with the really plain white toothpaste and nothing with those newfangled beads or bits in it. Clean-spinning and minty fresh!