Although I have not tried this, I know several people who swear that burying a small, plastic statue of St. Joseph (the patron saint of carpenters) works wonders. The statue is supposed to be buried head down, facing the street, next to the for sale sign...and once the house is sold, the statue is to be dug up and displayed in a place of honor in the new home. (Hey don't heckle me, I'm only the messenger, but I've heard enough success stories that I'm willing to try it the next time I'm selling my house!)
Here's a link to one of the stories about St. Joseph's impact on real estate sales.....
Selling your house? Bury a saint