You can cut above a pair of leaves and then make a lower cut about halfway between the leaf joints (I think this is called a double eye leaf bud cutting) then dip the end of the stem into rooting powder or gel. Cuttings should be taken when the plant is growing well - about now, really. As weejenny says, put them in well-drained soil to root and keep the cuttings in shade but keep moist. They root well kept inside the house, too, because of the extra warmth. I usually put a plastic bag over the top and tie it to keep moisture in myself. Apparently, you can also root them in water, though I've never tried it. You take a long cutting and put the bottom 8 invhes in water, change the water every three days and it is supposed to m ake roots in about a fortnight. Think I'll try it this year, actually.