If your home isn't selling, ask your listing agent to get feedback from brokers who have shown the house. Also, consider hosting a open house for broker's only. This gives you an opportunity to promote the property and get ideas on how to improve sale prospects.
Stir wallpaper paste for longer than suggested by the manufacturer to ensure that there are no lumps. A wooden dowel makes and ideal stirrer. Also stir the paste from time to time during wallpapering.