Make a doorknob wine stopper! Glue a sturdy piece of wire to the underside of the doorknob, then push the wire into the top of a cork. Put glue on top of the cork before pushing the doorknob down onto the cork.
Worn door handles -- Beautiful - you don't see hardware like this anymore. Most Victorian homes, even a modest one, have beautiful hardware like this - not just the knobs but hinges too! No detail was over looked.