Music is mellow. But not when showing a house. Turn off blaring radio and television. Let the salesman and buyer talk, free of disturbances. Keep them out of the way-preferably out of the house.
Silence is golden.
Be courteous but don't force conversation with the potential buyer. He wants to inspect your house- not pay a social call. Be it ever so humble. Never apologize for the appearance of your home. After all, it has been lived in.