I have a Gibson F-4 mandolin, SN 20130, in original condition. Its been in the family since new, purchased by my grandmother in NYC from a music teacher, a Dr. Wm. B. Evans, on May 12, 1913. (Yes, I have the original receipt.) I took it to Elderly instruments, in 2006, and they described it as follows: excellent condition, red sunburst finish, spruce top, maple sides and back, inlaid Handel tuner buttons, double flowerpot headstock inlay, original softshell case. Im not interested in selling it at the moment, but Ill eventually want it to be in the hands of a player. (Im a former musician, and would hate to have this instrument sitting unused.) What should I do to keep this instrument in best condition?