You can make a nice little income as a focus-group member: “If they ask you whether you’ve done one in the past six months, just say no. They never check. If they ask you something off-the-wall, like “Have you purchased a treadmill in the past year?,” say yes; they wouldn’t ask if that weren’t the answer they wanted. If they ask you what brands you purchase most often, always name big ones: Sprint, Budweiser, Marlboro. They’re representing either one of those companies or a smaller one trying to figure out how to steal you away. And, most important, let the recruiters lead you. Before you answer a question you’re not sure about, pause for a couple of seconds. They’ll tip their hand every time.”