Since the mighty banjoists of the world are here hows about your favorite tweak for the dusty unplayed banjo which then sounds like a Floweryinlaidgibson.

My theory is tighten the top till it creaks, the neck so bent it cannot budge, the bridge so tight it is ready to crack and the whoop ringing from the mere echo of a twang no matter how far away, or how faint; then and only then will it stay in tune.