Check with your realtor as to the best colors for marketability. Clean up clutter for appearances and safety's sake. Pay special attention to stairways, halls and children's rooms. Go on a kitchen campaign and keep it especially clean. The sink should always be clean and free of dirty dishes.
Counter tops appear more spacious when clean and uncluttered.
Make bathrooms sparkle by cleaning tile and porcelain. Commercial cleaners or vinegar will remove unsightly hard water stains. Replace any loose caulking or grout, and while you're at it, fix any dripping faucets. Clear out closets to make then appear roomier. Clean the fireplace and make a cozy, crackling fire.