Choose your cactus. Any with thick, fat pads and spindly arms will grow from cuttings.
Snip off a small to medium pad or arm at the base.
Cut the bottom inch or two off the cut piece and leave in a shady area for three days so it dries out.
Plant about 3 inches deep in a hole you’ve dug. Secure with stakes to prop upright if needed.
Water daily for three days and then every other day for the rest of the week. Switch to weekly watering and watch it grow.