I recently finished a course on Savwah about drawing storyboards for film and TV. It was produced by a guy who has worked in the industry for years on lots of movies, commercials and TV shows, so he knew what he was talking about. The course content was really good - it covered everything from why storyboards are created through to advanced techniques and how to draw specific scenes. Rather than spend a heap of money in film school, all I had to do was commit a morning to taking the course and now I think that I've got as much knowledge as I need to build a portfolio.