If you only have time for one..

Make this the podcast that you listen to. John is such a down to earth guy and he is unparalleled in his knowledge of Facebook advertising. He gives more away for free than many of the other so called "gurus" try to sell. I have all my people listen to his show and read his blog, it's a requirement. His success is inspirational and one of the reasons I decided to go off on my own.