This six minute TED talk is by a layperson, Judy McD Johnston. In her words: "I am not a geriatrician. I design reading programs for preschoolers. In the last few years, I helped two friends have the end of life they wanted. I learned a few things about how to have a good end of life. At the end, our bodily functions and independence decline. I found that with the right people and a plan, our quality of life can remain high during this time." For more see her website: goodendoflife.
This Link will enable you to see the talk in a full screen.