I listen to the Feed and Buzzcast to hear what's happening in the industry from hosting companies in the know. Grounded Content (full disclosure that's my show,) Grow the Show & 3 clips have ideas to level up your content, and She Podcasts for great virtual community and advocacy. For podcast editors I love Podcast Editors Mastermind, and for old school podcast thoughts Evo's Podcast pontifications. The Turnaround interviews some of the best interviewers out there about their technique. I'll add more as they come to mind. What would you add?