One of the best things about succulents is the ease with which most of them propagate. Many will grow more plants easily by simply breaking off a piece, letting the wound heal for a few days and then sticking it in the ground.
Many succulents send up "pups" like this flapjack plant (kalancho luciae)
When this container was planted in the street-side garden a couple years ago the container was filled tightly and a few were added to the ground for a bit of whimsy. As you can now see there are a bunch of new pups filling in under the mature plants. As is the case with many succulent containers, this one will need to be refreshed by dividing the plants and pups before the whole thing looks cramped and the older plants start looking straggly. The good news is I have lots of spots to fill in with the extras!