As usual, Thunderbird+ has succintly outlined the procedure. I would only add, that spring, just as sson as there's any indication of sap rising is the best time. I cut a small live branch, place it in a pail of warm water for about 1 week. At the end of that time, if you look closely, you'll see very small, delicate white roots beginning to extend from the cut end. At that time, instead of putting it in a sand lined trench, I have a 5 gallon plastic pail (cat litter container) that I fill 2/3's full with sand. I soak this with a light mixture of plant food and water and place the cuttings about 6 inches into the damp sand. Be sure not to let the sand dry out. As Thunderbird advises, don't keep it in a windy place, but a little sun can help, in my opinion. Transplant after about a month or so. The root system should be well developed and much darker in color then... Best of luck!