Lighting has an important effect on how we see things. Think of the last time you visited a museum or a lighting center. Experts suggest that you have plenty of light in your home when it's being shown. Drapes should be open and lights turned on. Plenty of light has a positive effect on your visitors.
Smells also play an important part in our emotions.
And make no mistake about it, many buyers are acutely effected by their emotions. You may want to place a bouquet of fresh flowers on the dining room table. A moderate use of pot pourri in the bath might be a good idea. Some even suggest a loaf of fresh baked bread in the kitchen as a way to invoke happy memories. Be careful not to overdo it.