Truly inspiring and insightful TEDtalk by Timothy Prestero, founder and CEO of Design that Matters, a nonprofit that collaborates with social entrepreneurs and volunteers to design products for the poor in developing countries.

Not only does he discuss determining the right solution from every standpoint (“…figure out who will choose, use and pay the dues for your product”), but he provides a great perspective around “requirements gathering” in the face of true obstacles, behaviors and needs.