There are few remedies as simple and foolproof than going on a walk.
When you are on a walk you can:
—observe elements of city life
—observe the changes of the seasons
—take notice of pretty flowers and trees
—take notice of cute babies and dog
—run a quick errand
—make yourself invisible
—explore a new area
—listen to music
—listen to podcasts
—call your mom
—call a friend
—feel your body move
—take notice of what you need