'Props' may be a bit of a generic term, but it is important to not limit what our imagination can transform something into. More than mere objects or a set, props add texture and balance to the space.
Cubes can be stacked to form a creative altar, wooden pallets can be tied to each other to form a three dimensional wall, and draped fabric can add a softness not otherwise found in traditional architecture.
Whether it is something custom built or an item you found while wandering the local hardware or home decor store; play with the ordinary to create the extraordinary.
A few items to play with: