Choose a public starting point
Meet at a public entrance or pavement landmark. Check which spaces are open to visitors and avoid assuming that an interesting doorway is public access.
Change your distance
Look at the building first from across an open space, then from closer to the facade. Notice how materials and details change the impression of its shape.
Make a short record
Write down one material, one line and one question. This simple record gives you a way to compare places without turning the walk into a photography assignment.