9. Get Psyched Up to Let People In
If you're listing with a real estate agent, she'll ask you to leave when the house is shown. Why? Because lurking sellers make buyers nervous--they don't feel comfortable inspecting the house when they feel they are intruding in your personal space.
Unless there's a valid reason for it, don't ask your agent to be present for all showings, because that requirement can be the kiss of death for showing activity. Other agents want privacy with their buyers and they don't usually have time to work around your agent's schedule.
Make the house accessible. That means it should always be ready to show. Many agents won't bother showing a house that takes 24 hours to get into.