A book which I feel is becoming a must-read for the left-behind spouse is The Journey from Abandonment to Healing by Susan Anderson.
There is a blog post that gives some examples of the techniques Anderson discusses for putting yourself and your life back together.
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement