First I invision what I think the video is going to be like and sound like based on the topic I chose. Then I just begin to rant/write things down sloppily on a word document. Then I open up Audacity a day or so later usually and read over the script one last time. I read parts of the script before I record it, and edit it again for the way it sounds vocalized. Then I begin to record it piece by piece, usually still not following the script exactly and adding and removing parts, doing a lot of retakes, etc.