6. Roomy Aisles
Department stores also strive to offer shoppers plenty of places to comfortably stop, increasing the chance that they'll take some time to look around and buy something. Underhill calls it the "butt brush factor," where shoppers, mainly women, are less likely to buy if they're crowded from behind. They prefer a comfortable place to stand and look at the tie or blouse, he says.
(AP Photo/Mark Lennihan)