Calling on customers as consultants also has a hidden benefit: if your topic of interest is something that people may find too personal, too hard to be honest about—asking them indirectly can be most revealing. Jack may not be willing to tell you bluntly that he thinks your product is hard to use—that might make him feel stupid. But if you ask him how your product could be improved, he will be more comfortable suggesting that “some people” will find the product easier to use if the dials were just a little larger. It’s a twist on the old ploy, “It’s not for me, but…