Clean, Clean, Clean:
Step back for a moment and look at your home as if you were seeing it for the first time. Every room should be neat, spotlessly clean, dusted, and uncluttered. Steam clean the carpets and wax the floors. Wash the walls, windows, and light fixtures. Tighten loose stair railings and clean all woodwork. In the event that you feel a project of this magnitude is better left to a professional, ask your real estate agent to recommend a professional cleaning service.
Use bright light bulbs in the foyer and throughout the house. Fill the house with a pleasant aroma, such as berries in the summer or cinnamon in the winter, or some other fresh scent.
Replace the carpet if it's old or worn. It costs money, but you may find that you will more than recoup that cost when the house sells. Patch cracks and nail holes in the walls, and repaint walls in neutral colors, such as white or ivory. Nail down creaking boards and stair treads. Lubricate any sticking or squeaking doors. Open all curtains, and replace them if they are getting old. Add lamps and lighting if the condo is dark. Set out fresh flowers.
Rearrange or move furniture to make your rooms look more spacious. Discard worn furniture and move extra furniture to a storage unit. Remember, too much furniture and too many knick-knacks make rooms look cluttered and small. One or two decorative items per surface is plenty, so pack the rest away. Visit model condos for decorating ideas.
Kitchen and Baths:
These rooms should sparkle! Clear off counters, and clean all appliances and fixtures. Scrub the floors and walls. Re-caulk tubs and showers. Clean these rooms thoroughly, and be sure they smell fresh!
Take those things to Goodwill that you'll have to discard anyway when you move. Organize shelves and straighten shoes. Be sure that sliding doors operate smoothly on their tracks and knobs on drawers are secure.
Dust and wash off lint from the washer and dryer.
Light and Bright:
Do everything you can to brighten the interior. Replace wallpaper with white or off-white paint, and repaint shabby or dark walls. Open the blinds, and replace broken windows and window seals. Always maintain a comfortable temperature inside the house, even if you are away for an extended period of time