“Where do I start?” came the first question from a woman sitting in a group who’d gathered at a bookstore in Salt Lake City, where I was talking about downsizing. “In the place that bothers you most,” I say. I don’t tell her that starting the process of sorting through a lifetime of accumulations to let go and lighten up feels, at first, like stepping into quicksand. “What about my tools?” asks a gentleman in his 70s.