Use speed when capturing your pictures. If you take too long, the subject could move, the sun could move behind a cloud or it could start raining. Anything could happen, so don't delay. A camera which allows you to make quick photos will give you the best results.
Make sure to set up your compositions so that vertical lines are truly vertical. Tilting the camera backwards to capture a tall building, for example, can cause the building to appear as if it is falling backwards out of the frame. Photographs in which buildings are not vertical often appear unnatural.
What I love about working at GTA Photography Classes.