Yog is a battle against Kleshas and is a process of attenuating, weakening and destroying Kelshas.
Prashant states that, "What one does is not really Karma but why one does it is Karma."
Karma then is not merely the act or action.
We must develop a habit and attitude to ponder over one's Karma, asking questions like, "What was done?, "How was it done?", "When was it done?", "Why was it done?" and "Alternatively, how could it have been done?"
This is just a few points to ponder, as Prashant has written another wonderful book to help explain the Philosophy of Yog.