I recommend any of the podcasts by Ryan Van Haren who is a controller at Vancouver and a pilot-coach. Fascinating stuff ranging from back-country landings to IFR procedures with some interesting human factors pieces for good measure. A mainly BC/Canadian orientation but much is applicable to aviation elsewhere:
http://www.cardinalaviation.ca/podcast
I have listened to almost all of the 55 available episodes. They can be downloaded via your favourite podcast app - search for Cardinal Aviation. For iPhone users, I recommend Overcast.