Price it a bit below market and make sure that it is pristine condition. The best priced nicest homes sell the fastest. Check with a realtor in your location to get accurate comps of not just what has sold, but what is on the market. Go look at some of the properties on the market - as this is your competition.
Linda is right. There are things you can control (price, condition) and things you can't control (location, comparable properties). Focus on what is in your control. Selling a home is a competition between your property and the one for sale down the block. Look at your property objectively and make it competitive.
Unless you're a real estate pro, get a pro to help you (read "The Richest Man in Babylon").