I walk aimlessly every single day that I can. It's been a habit since I've literally walked to school damn near every day since elementary.
Today, I take random breaks at work and just go walking around the neighborhoods and thinking to myself. I feel like its silently held my sanity together through everything I experience. It's a chance for me to consider what's happened recently and how to integrate that into who I am, how I feel, etc. You also get a better perspective for what people are doing in the environment around you and changes in the environment itself.