Having a silhouette of a person or object in front of a light background will create some stunning contrast.
Since black and white photography is all about playing with only black, white, and shades in-between, always emphasize the contrast in the photos you take. When taking a photo, think about how it will look in black and white. A bright sky will look interesting when contrasted with a dark object. Having a silhouette of a person or object in front of a light background will create some stunning contrast.