The Photoshop TV podcast receives about 2 million downloads a month. If you create a podcast with a how-to focus, your popularity will explode. People search for information, research, knowledge. They want to learn how to do things. http://www.printondemand.com/MT/archives/008610.html
I think all the podcasts on the idratherbewriting should convey this how-to focus -- as much as possible anyway. Most topics are really how-to, although they aren't titled as such.
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I'm a technical writer based in the California San Francisco Bay area. Topics I write about on this blog include the following technical communication topics: Swagger, agile, trends, learning, plain language, quick reference guides, tech comm careers, and certificate programs. I'm interested in information design, API documentation, visual communication, information architecture and findability, and more. If you're a professional or aspiring technical writer, be sure to subscribe to email updates using the form above. You can learn more about me here. You can also contact me with questions.