Going through the house, both inside and out, making a list of things to do is a great investment of your time. Outside, work on curb appeal, cleaning up trash, mowing lawn, trimming shrubs, painting if necessary. Make sure roofing , eaves and gutters are securely attached. If you cannot or don't want to do these things yourself, hire someone. Make your home look and smell as much like a new model home as possible.
Advertising attracts potential buyers, but merchandising and marketing are what sell homes.
Focus on buyers needs and desires. Understand how most buyers want to buy. Newspapers - local and regional ads are a must. Compare prices and readership figures. Make it descriptive, not cryptic.