There’s a marketing case study in here:
(Dr. Kivetz, of the Columbia Business School and Anat Keinan of Harvard) managed to change consumers’ behavior simply by asking a few questions to bus riders going to outlet stores and to other shoppers shortly before Black Friday.
The people who were asked to imagine how they would feel the following week about their purchases proceeded to shop thriftily for basic necessities, like underwear and socks. But people who were asked to imagine how they’d feel about their purchases in the distant future responded by spending more money and concentrating on indulgences like jewelry and designer jeans.
From John Tierney’s piece on oversaving.