Enter a public transport vehicle (if your city is too small, go to a big shop of choice e.g. supermarket). Look around and notice the people around you. Select one person and follow them, keep a bit of distance, and follow their path, as they leave the public transport/shop. Do not be intrusive. Your walk ends as soon as your selected person enters a building. How was it for you, to follow somebody without a destination? Pick another person and experiment again.