There are a lot of good suggestions here. I will add recognizing that living in a city is about sharing. I have lived in San Francisco for over twelve years an

There are a lot of good suggestions here. I will add recognizing that living in a city is about sharing. I have lived in San Francisco for over twelve years and the most important thing I learned or realized is that living in a city is about sharing. I have to share with the other folks here. Walking and driving are two obvious examples. But we also share an aural space. Certainly with my neighbors but more generally too. I share the backyard with my building neighbors. I share the city services. We share the air we breath as you notice instantly walking near someone smoking. Outside of my home there is very little I can do without interaction with others around me. This is true generally but in a densely populated space, like a city, you can't avoid it. It's just the way it is. The requirement that we share doesn't mean that everyone does so gracefully or respectfully. Myself included. Nonetheless I propose this is a fundamental personal step that contributes to better cities.