Ask HN: How do I retain more information from podcasts?

I listen to a lot of podcasts, mostly when commuting. Any tips for retaining more of the information?

I suspect that the only way is to treat podcasts like lectures: take notes then process them like you would lecture notes (spaced repetition etc).

It seems like I'd have to listen to the podcasts twice. First listen for interesting content I want to retain, then actually note it down.

Can anyone suggest a better approach?