Any tips of making video presentations?
 

Have to do a video presentation. I'm simply using Camtasia Studio to record the screen and my voice into an AVI file, while I show everything.

I unfortunately don't seem capable of presenting my computer monitor and microphone with a quality, seamless presentation for 15 minutes straight. I'll always stutter somewhere, or mixup words, lose my train of thought, or simply fuck it up. So then I start over from the beginning, and it goes round and round.

Any tips? How the fuck do you talk to a computer screen flawlessly for 15 mins straight?

Multi-track recording.
Try the ZOOM H4 digital audio recorder. It has 4 separate tracks.
Divide your presentation up. Do a little on each track. Start at the beginning on Track one, until you make a mistake. Stop and record from there on track 2, etc.

When your done. I think the H4 comes with editing software. Mix it down and save it as a wave. then use the wave file to ad to your video.