Thoughts of themselves have no substance; let them arise and pass away unheeded. Thoughts will not take form of themselves, unless they are grasped by the attention; if they are ignored, there will be no appearing and no disappearing.
Ashvaghosha – [Thoughts and Thinking]
When one is rising, standing, walking, doing something, stopping, one should constantly concentrate one's mind on the act and the doing of it, not one ones' relation to the act or its character or value… One should simply practice concentration of the mind on the act itself, understanding it to be an expedient means for attaining tranquility of mind, realization, insight, and wisdom.
Ashvaghosha – [Peace of Mind]