Navigating dense urban environments can be made infinitely less vexing if everyone would just walk faster. It's not hard to do, either. Just pretend that you have a purpose. You know, like you matter to the world. Life is fleeting, so maintain a healthy pace. And please, keep your eyes open. There are people everywhere.
In fact, that might be the key to being a better Samaritan: There are people everywhere. They can see you. You can see them. Now act like it matters.