I recently gave a presentation at Lavacon on audio voice over techniques for video tutorials. In case you’d like to view the slides, I uploaded them to Slideshare.
You can also download the PDF.
Note: I have a few audio and video clips that I had to link out to other websites. I didn’t create this PowerPoint with the intention that it would be viewed and understandable without a presenter. Still, you can probably still get something out of it.