If you read many “how-to” podcast articles, or–like me–have entered the endless loop of how-to-podcast podcasts, you’ll see the same advice over and again about calls to action: Focus on one. It could be “subscribe in iTunes” or “follow us on Twitter,” or “tell us what you think about xyz,” but it should be only one so you get a critical mass behind it. And while I sympathize with the desire to move away from the ubiquitous podcast outro: “signupforournewsletterfollowusonTwit