People used to make several trips to a store before buying an expensive item like a couch. They would go once to browse options, again to narrow down their favorites, and again to finally pull the trigger on a blue velvet love seat. On each trip, they were likely to make lots of other small purchases as they wandered around. But today many consumers can do all their prep online, which means less ambling through shopping centers and less making incidental purchases at adjacent stores (“I’m tired, let’s go home … oh wait, there’s a DSW right there, I need new sneakers”).