Geraniums are easy. I've done those many times with no special setup. And of course, Coleus are also very easy. I've taken cuttings of Cup and Saucer Vines with good luck, although I had better luck with the purple ones than the white, for some reason. Bottom heat (i.e, a seedling heat mat) is generally helpful, too. I keep meaning to try cuttings of the Osteospermum on the back porch, but the darn thing is so covered with flowers I hate to hack on it.
