Do an Open House on a week day and a weekend at least twice a month. Put signs out early in the week, so potential buyers will know it will be open. Make it a festive event with balloons, signs on intersecting streets, Advertise in local neighborhood news papers. Make sure your real estate agent is on all the major real estate websites; such as Trulia, Google, Yahoo, & Front Room.com, etc. Have you seen your MLS Listing? Does your listing have good pictures? Is the description and information correct?
Is your property priced right for the area?
I could go on and on, but I think this is a great start.