Mindfulness is meditation in action and involves a "be here now" approach that allows life to unfold without the limitation of pre-judgment. It means being open to an awareness of the moment as it is and to what the moment could hold. It is a relaxed state of attentiveness to both the inner world of thoughts and feelings and the outer world of actions and perceptions.
~ from MINDING THE BODY, MENDING THE MIND by Joan Borysenko
Voluntary simplicity involves both inner and outer condition. It means singleness of purpose, sincerity and honesty within, as well as avoidance of exterior clutter, of many possessions irrelevant to the purpose of life. It means an ordering and guiding of our energy and our desires, a partial restraint in some directions in order to secure greater abundance of life in other directions. It involves a deliberate organization of life for a purpose.
~ Richard Gregg in VOLUNTARY SIMPLICITY by Duane Elgin