Replace discolored or cracked switchplates. Clean out closets to display their roominess. Be sure clothes are hung neatly and shoes and other objects tidily arranged. Bathrooms should appear neat with attractive spreads and curtains. Clean and organize the basement, attic and garage.
Many families tend to learn to live with broken doorknobs and cracked windows.
All of these little things should be fixed because no prospective buyer wants to do the things you have let stack up. Of course, an investment in a paint job where it's obviously needed will be well worth the cost. The same is true with carpeting that is shabby enough to be a turn-off Most people out shopping for a house would rather plan their own major changes, and you are usually wiser to sell them the potential at a price they can afford. The television and radio should be turned off. Let the salesperson and buyer talk, free of disturbances.