I've become addicted to listening to (other people's) podcasts, especially on history. It turns out there are now good series on many topics with more emerging all the time. I like most the ones that follow the template laid down by the History of Rome, which is probably the most influential of all history podcast series. This is the template I follow myself: take a historical subject, start at the beginning and tell it in installments in great detail. That podcast finished with the demise of the Western empire but has been continued by the (in my opinion equally excellent) History of Byzantium. These by the way make good historical background for HoPWaG. Unfortunately no one has yet launched a History of Islam podcast, which someone really should. But there are good medieval history ones, I have just been getting into History of the Crusades which is witty and very accessible (maybe a bit basic at first but gets more detailed and interesting as it goes). The British History podcast is also excellent, very detailed and often funny, and has covered ancient Britain and early medieval Britain so far. Then Lars Brownsworth has done an earlier podcast on Byzantium (good but not nearly as detailed as the more recent History of Byzantium one) and now a podcast on the Normans, which I like. Less related to the periods I've reached is a podcast on WWII which seems to be very popular and is extremely detailed. Finally, check out the facebook group for history podcasters which has links to many more - but these are the ones I've been managing to listen to myself!