Insomnia is the infomercial’s greatest friend. I don’t know what it is, but after midnight, the Ginsu knife collection becomes the most ingenious piece of merchandise in the history of mankind. I mean, c’mon, who doesn’t need a knife that can dice tomatoes and cut up your shoes all at the same time? The marketing concepts behind the infomercial brands are designed to manipulate you into thinking you can’t live without their products. The lighting, the quick-talking front man, the easy-to-assemble gadgetry, and the unbelievable price of 19.99 all work together for a pretty good sales pitch. Many times I …