I listen to a lot of podcasts also. I try to retain a lot of info from them. The method I have been using (which does not work if you're driving) is while I'm l

I listen to a lot of podcasts also. I try to retain a lot of info from them. The method I have been using (which does not work if you're driving) is while I'm listening, when I hit something interesting, I open up my iOS notes and make a note of it. When I have free time at night, I go through those notes and do research and create Anki flash cards. This method works well.