Here's a quick home-selling tip:
When getting ready for your first showing, try to imagine your mother-in-law is about to show up for a visit. Think how clean the place will need to be - like an upscale hotel. Vacuum, dust, mop, wash windows, and even clean the baseboards and other areas you might not commonly wipe down.
People will be looking in your closets and cupboards, as well as under the sink. If there are any odors in the house, those should be removed, as well. Ask a neutral friend or trusted agent who will tell you the truth to come give your home a "sniff test" so you can be prepared for potential buyers.