Getting nice exterior shots is often about timing. I usually scout my location beforehand, establish my camera angle, then determine the best time of day for the light to strike the front -- usually requiring a return trip, closer to the ideal time. Such was the case for both of these shots.
However, for the street-scape of Decatur, GA (right), I knew what my vantage point would be when I accepted this assignment because my client already had some snapshots taken there. What I didn't know was that a 9' wall surrounded the top of the building and since I was aiming for dusk there wasn't time to come back with a ladder and still get my shot. Several days passed before the light was right again, but it had gotten colder. Not a big deal for me, but with one of the goals being to include pedestrian traffic I wasn't going to get a lot because of the weather. What I did was establish my camera position, then shot multiple shots every time someone ventured into my frame. For the final image all of the car positions, and all of the people positions were blended together in post production.