As part of my interest in television, I've been watching some nice, informative videos by USC professor Pamela Douglas. I stumbled across them while trying to figure out how much a TV drama episode costs (answer: $2-$5 million).
Douglas gives very clear and insightful explanations about history and trends in TV drama as well as the mechanics of writing, funding, and producing TV dramas.
Note: I just discovered that Videojug (the site hosting the Douglas videos) allows you to download the videos and also read a text transcript. Reading the text is much faster than watching the video.