You can reproduce it from cuttings. Cacti can be surprisingly difficult to take care of, or possibly surprisingly easy. They can get odd infestations which can wipe out several cacti at once. You're best off buying a book that can tell you what to look for, and make sure whatever it is isn't crawling on any cactus you buy. I don't know how to reproduce the other kinds.
Jade plants are sometimes tough to get the hang of.
Mine dropped a lot of leaves until I figured out how often they wanted to be watered. I have managed to root some cuttings in sandy soil watered once a week. As you can tell, I know nothing much about bromeliads, so here are some random links to better pages . In general, it seems that humidity is good, and letting the pot sit in water is bad. They are really neat plants, but nearly impossible to keep alive.