Michele's academic text explains SBT theory in detail. It is called In Search of Solutions. Also, her book Divorce Busting covers the theory at a laymans level as well.
Basically she argues that action drives thought, rather than thought driving action.
Her point is simple. If you want to feel a certain way, DO something that you have experiened drives your moods in that way.
Michele suggests that the physical action, adjusts emotional response, becuase hte environment has shifted from the physical action.
If you want to feel better, do something that makes you feel better.
Sitting and waiting for the mood to arrive before you act just promotes a vicious circle of procrastination.