When I first met Susan in a cafe in Paris 20 years ago, one of the very first things I told her was that I had a list of all the things I was going to see in Paris during my vacation there. According to Susan, my super geeky line in asking her to join me on some sightseeing went as follows: “I am going to do all the things on this list, so happy to start wherever you want." A lot of things have changed in the two decades since but my love for lists continues: I still keep many different lists...