If you do “on the street”-style recording for your podcast, a mic flag is a great way to give yourself some intstant credibility. What’s a mic flag? Think of what you see on every mic carried by a news anchor on TV. Now you get an idea of why this might give you some extra cred.
You can buy one here or, if you want to be resourceful, you can watch the following video about how to make one yourself. RSS readers may need to click through to view the video.