Keep on looking at various scenes around you wherein shadows can add new interest to a photograph and surreal images other than silhouettes. With little practice, one can make shadows as powerful and interesting element in black and white photographs.
Start looking around with a keen eye and you will find shadows in many places and in many shapes and sizes. It is often said by creative photographers that the more one begins to notice the shadows, the more he or she starts pointing his or her lens at them.
At times, you can put small shapely objects or toys quite close to a bright lamp and get ready to get giant shadows for taking snaps to begin with.
Also, explore the possibilities of taking photographs of people from a high point in the early afternoon sun.
Another aspect in exploring shadow photography is in the form of hiding a part of your subject in shadows to add some drama to the image. Use split light patterns to illuminate the subject to get interesting shadow images.