The ‘Bird’s Nest’ succulents naturally propagate from underground rhizomes that run on top of or just beneath the surface of the soil. Propagation can be done by dividing the rootball, from offsets, and from leaf cuttings.
To propagate from a leaf, take leaf cuttings and have them callus over for a few days. Place them in water or soil in the same direction they normally grow. Upside down cuttings will not take root.
Propagation also works well by dividing the root ball. Separate and place each division in a new pot with a drainage hole. Read more on Propagating Snake Plants here.