I enjoyed this article on how to make the perfect screencast from the MakeUseOf.com. The only advice I'd add is creating a slideshow in OpenOffice, PowerPoint or Keynote and switching between that and what you're actually recording. This will allow you to easily blend in components in the middle of the recording rather than having to do it after the fact. Of course, I'm a bit lazy when it comes to recording screencasts, preferring to do it all in one take.
All the other great advice in this blog entry from MakeUseOf.com's Wez Pyke is right on target, however!
Posted from Diigo. The rest of my favorite links are here.