Here's a simple Instructable for recycling old floppy-disc rings into a pair of smart earrings:
Link (via Make)
Open the two round jump rings and attach one to each v-ring. Before closing them up, attach the earring wire to each. Close both jump rings securely with pliers.
Note: when attaching the earring wires, make sure that the part that goes into your ear faces the "back" of the earring-- I consider the "front" of the floppy centers the side where the middle concaves out a bit from the edge.