This is one of the most powerful tools in your arsenal - mindfulness. This includes paying close attention to your bodily functions, people's actions and speech, your environment (city block, in this case). It is something you MUST develop daily, weekly and year upon year. It will take great effort and concentration and deduction, as well as guess-work and hypothesizing and testing, but it is one of the most rewarding skills to have, of all. Start the journey - it's never too late and you can meet be TOO MINDFUL of yourself, your environment or people around you.