I was riding to an IEEE meeting a few years ago with a friend. The trip was going to be about 45 minutes long so he turned on a podcast he regularly listened to, Manager Tools, to help pass the time. After listening during our trip, I was hooked and subscribed to the podcast myself. I regularly listened to it until I retired.
This is a weekly podcast begun in 2005 and presented by Michael Auzenne and Mark Horstman. It focuses on how managers can be more effective and provides career planning suggestion. There are now over 500 episodes in their library. Each episode of this award-winning podcast is between 30 minutes and one hour in length.
I found this podcast to be very informative and useful. I recommend it to anyone in a leadership role. They can be subscribed to in iTunes.