I find it easier to navigate in cities if I see them as a wilderness with diverse wildlife. Like all wildlife they all have their own behaviors and niches in the environment. Like valleys on either side of a ridge each has its own unique ecology.

Withing each zone you have herbivores and carnivores. Hunters and hunted, opportunists and scavengers. Many are cliff dwellers and some live underground. Some enjoy the sunlight while others are mostly nocturnal.

Like naturalists everywhere you have to mix blending in, so you don't disturb their natural behavior, with actively avoiding looking like one of the prey species to the more aggressive inhabitants.