Here is some great advice from FannieMae on selling your home.

When you are making a decision about a major life transition, (perhaps you want to move into the city or you want to downsize) there are a few items that warrant your consideration.  It is important to:

Determine Affordability: What is my unpaid principal balance?

Review Market conditions: analyze the local market, check JohnMcCracken.SmartHomePrice.com, or Trulia or Zillow;

Be Prepared: Inspect your home with fresh eyes; and

Decide how to list: Am I going to do this myself or should I hire a professional. FannieMae suggests that “Unless you are experienced at selling homes, it usually makes financial sense to get professional help ⎯ homes sold by agents typically sell at a higher price and spend less time on the market.”