Since we're on the topic of Audio capture, one of tips I remember came from an article about mobile Podcasting. This was when the iPod first came out years ago and there was a slew of audio podcasting stations (which I see now replaced with Video castings. So Podcasters who traveled the country often needed to setup a microphone and record themselves, sometimes in a hotel room which wasn't always the best place for clean audio. If you catch some of my random videos shot in the warehouse (even on Zoom H1) you'll hear a bit of reverb from the sound bouncing around on the walls.
So the tip that I was reading was that you don't necessarily need an extremely large sound booth to contain a whole person. That's mainly used to block out ambient noise. If you're in a fairly quiet spot and you want to minimize the reverb on the microphone you can just contain the microphone into it's own little sound booth. Anyways, I forget where that article was but Fred over at Tuperhero.com has a budget way of making a DIY portable sound booth to contain your microphone or portable audio recorder. With this positioned close to your subject and out of camera frame, it could help clean up the audio pickup from all that reverb and minimize some of the ambient noise from the sides and rear of the microphone pickup. [Thanks Fred]