The Rage/Sooth ratio can come into play in a number of different ways. When I read Mindbody Prescription, I tend to view what Dr. Sarno is talking about as, sometimes in life when we have a signficant amount of stress and tension going on our level of unconscious rage increases and boils over to a point where we develop TMS. In some of these situations, learning to reduce stress and tension can help sooth our unconscious and reduce our level of rage. In practice, I think this involves understanding how much anxiety and tension you build up in your body every day, and where it goes. Then you can find ways to reduce your stress.
I do think that a lot of the soothing that comes with TMS involves simply understanding that our symptoms are benign. Knowledge is the penicillin for this disorder. A lot of own worry and anxiety was generated from thinking there was something wrong with me. Accepting the diagnosis and realizing that I was not damaged really helped me to reduce my fear and turn the Rage/Sooth Ratio more towards sooth.