Great write up Vaidy! I guess that is why people say Yoga is all about the body-mind connection. While other forms of exercise mostly focus on the physical aspects of the body, Yoga takes it a step further involving the mind as well. Deep breathing in the form of Pranayama also certainly helps to calm the mind.
Other than that I think you briefly mention about deliberate practice, (in your case, practicing positive affirmations based on a belief) which could be, in my opinion, achieved independent of whether you are practicing Yoga or not. But I am glad though that you were able to achieve it through Yoga :). Yoga sutras rock!