Remove a terminal branch back to a plant node. Use a sharp knife so the cut is smooth. Wipe the knife with alcohol to sterilize it. An unsterilized cutting tool can introduce disease to the parent plant and the cutting. The cutting can be 2 to 6 inches long as long as it ends with a growth point. You can also use a branch that has fallen off the jade plant.
Lay the cutting out in a warm room for two or three days until the bottom callouses over. This will enhance the formation of roots and help prevent rot. The leaves on the cutting may get a little wrinkly but don't worry about it.
Mix together equal parts of potting soil, sand and perlite. Pour the mixture into a small pot and moisten it thoroughly. After the cutting has calloused, insert the cut end into the planting medium. Push enough of the stem into the soil that the cutting can stand upright when you press the medium around it.
Put the pot in a warm, dry place for one to two weeks, or until the plant begins to root. You do not need to water it until roots begin to form. After you see roots, give small amounts of water, but let the planting medium dry out between irrigations. Lighting is now of importance, so make sure the plant is in a sunny and warm location.