Part 2 of the class Drawing for People Who Think They Can't is now available for purchase. It consists of 5 videos, each an average of 35 to 40 minutes. This is the first I've done instructional videos and I'm psyched about them. It seems it may actually be a more effective way of teaching as you can watch demonstrations and listen to explanations over and over again.
I think you'll find these helpful and hopefully clear and easy to understand. Below is an excerpt from one of the videos that is a fun speeded up version of a segment on the quick sketch.