As the wag once said, you can’t swing a dead cat in this town without hitting an aspiring writer. And even more numerous are the people who will give that aspiring writer “advice.” Pick and choose who you listen to carefully. And you can’t do much better that the insight you can glean from The Rouge Wave, a site written by a screenwriter and studio reader. Part how-to-please-the-reader guide, part fount-of-inspiration, part kick-in-the-ass, the Wave-inatrix is an insightful guide to this business we call show. To wit, today’s entry on the 3 P’s.