Let's say you've made a few podcasts that you're proud of...mostly. There's always room for improvement, right? If you use GarageBand as your main podcasting tool, check out these tutorials at MacProVideo. Tips include using the right EQ settings for your voice, volume management and getting the most out of your remote Skype and other over-the-net sessions.
It's $29.50US for nearly two hours of video (you can view two demo videos at the website). Check it out, and bring your podcasts to the next level.