If you like the idea of being your own boss (I certainly do), chances are you get the itch sometimes to create your own product — a product whose direction you control, that you do not have to compromise on with someone else, and whose fruits you get to fully enjoy, instead of being paid by the hour or a flat rate. It could be a Web service, a WordPress plugin or a desktop application, but the core problem is the same: how do you pick an idea that will succeed?