You must make your podcast unique and stand out from similarly themed podcasts.
To attract and maintain an audience, you will need to provide original content.
If you have a point to make, make it in a reasonable amount of time.
The format of the podcast should be consistent, persistent and stable.
Listeners will not want to strain to hear a podcast. Podcasts must have global reach and often global appeal.
Use critical and related keywords and phrases that relate to a common theme. The text in the feed is important for both feed optimization and for attracting listeners.
In order to maintain a listening audience, it is important that broadcasts are consistent and satisfy the expectations of listeners.
Archives allow broadcasters another channel to benefit from the content. Maintaining archives of older podcasts might bring in new listeners and satisfy listeners who just can't get enough.