David Nesmith discusses how The Alexander Technique & Constructive Rest will enhance your life in this podcast with Robert Rickover. Mr. Rickover hosts a variety of podcasts at Alexander Technique Audio Resources.
This is a very well done video introduction to semi-supine produced by Carolyn Nicholls, author of Body, Breath & Being: A New Guide to The Alexander Technique.
Lilly Sutton has created a Guided Constructive Rest lesson on CD, including a 16 page booklet. Order direct from her: