Would you like to be a guest on a podcast?  If so, you want to pay attention to what Kelly Mosser has to say about pitches.

The biggest mistake most potential guest make is the emphasis of the pitch. The message boils down to "I want airtime on your show. Here's why I deserve it. Here's why you should give it to me." This one-sided approach misses the key detail that podcasts are a business collaboration.  When you focus on what you can get, and what the audience might take away, the host and the show are kind of forgotten. Put yourself in the shoes of the host. Why would they want someone on their show who doesn't care about them.

If you understand you are entering a business partnership with the host together it is easier to think about how can you help the host achieve his/her goals. Then you need to explain what you bring to the audience.  When you start with that approach  you are much more likely to be invited to be a guest on the show.