When you are selling your home, make sure the Buyer can easily invision what the room is supposed to be. A Buyer can not invision a room if you do not display it properly.
Clearly define the space. If the room is supposed to be the diningroom then set it up that way. In spare rooms, make sure that there is a bed and dreeer in there. These rooms tend to become "junk rooms".
Remember to make the master bedroom as clean and inviting as possible. No clothes outside the closets and dressers, make the bed and no toys, kids drawings and stuffed toys. Present this room as a grown up space.
To some people this may seem like a normal practise but for some they need to be reminded.