Have you noticed? Temperatures are rising, which means summer is about to make its big entrance. For most of us, that’s entirely good news, because summertime means things like vacations, cookouts, and maybe even some time at the beach with a good book. For salespeople, though, the advent of summer is likely to be a bittersweet development, one that leads to an unnecessary drop in annual income… because of the Myth of the Eleventh Commandment.