Having a strategy in place to take something like a podcast episode and turning it into even just a few other pieces of content can help you maximize your efforts though, and the more you make it a part of your standard production workflow, the easier it will be, and you will see results from your work.
Seriously, I'm beginning to think this is the Holy Grail of Content Creation. To be able to take a piece of content and make it consumable to eyeballs and earholes that wouldn't find you otherwise? Fantastic.
If our stuff is as good as we think it is (and I hope we all are working to that), then why wouldn't we want to get it out to as many people as possible. Especially if what we've made might help a person that would never find you on, say, Instagram?
Make something that gets people to your site from Instagram, for Pete's sake.