I’ve always been guided by Einstein’s response to how he came up with the theory of relativity: he said he “rode a light beam,” meaning he imagined taking a trip on one and all the aspects of such a trip. When I am considering any new important thing I try to run a movie of all the different aspects of it in my mind. For example, if I’m selling a property I imagine a single realtor brings in a family of four to view the house, two adults and two teenagers. The realtor begins a room by room tour, but soon the teens have gone off on their own. As they enter my bedroom and bathroom — or any other room — what might they do that I wouldn’t want done?