I have this 'bad' habit of tossing clippings into unoccupied pots. Sometimes if leaves fall off, I'll gather them and toss them into a pot. Some root and some don't.
This picture here is of several gollum jade plants growing from the leaves I've tossed into the pot. Eventually I'll split the random cuttings into different pots (I have an easter cactus and some leafy plant growing in this same pot as well).