Huffduffer is a very simple idea which works so well.

Find audio files from the web, pop them in your own podcast.
You’ll just need to paste in the link to an audio file, then write a little about the audio file you’re ‘huffduffing’.

Here’s mine, with a little Atlas Sound just in time for Hallowe’en.

If you’re really keen, you can subscribe to a podcast of all that i’ll huffduff in future.