Locate your piano in a room or space having a constant level of temperature and humidity. Good humidity control prevents wooden components of the piano against warping and extends the lifespan of the instrument.
Store plants and art objects elsewhere and not on your piano. Plants contain moisture that damage finishes, and objects of art scratch piano surfaces.
Dust your grand piano regularly. A lamb's wool duster or a soft lint-free cloth picks up the dust without marring the surface finish.
Clean the piano keys with a soft cloth. Dip the cloth in water containing dish detergent, and wring it nearly dry. Wipe the keys with the cloth to remove dust or other foreign matter.
Call a piano technician to service your piano when an object falls inside or when the piano needs tuning. A baby grand piano needs tuning at least once per year.
Play your piano often. Frequent use helps a piano to acquire a distinctive "voice." Each time you play your grand piano, you help to increase the beauty of its sound.