Select a healthy devil's ivy plant from which to take a cutting. Select a healthy stem with healthy-looking leaves.
Cut the tip off the healthy stem so it contains two or three leaves with a 2- to 3-inch section of stem underneath. Use a pair of sharp, clean hand clippers for this step.
Place the stem in a clear jar or container filled with room-temperature tap water. The leaves should be above the water line. Use bottled water or water from a friend's house if your water is soft and contains too much sodium. The clear container allows you to monitor the cleanliness of the water easily.
Place the container in a bright location, but out of direct sunlight. Change the water two or three times a week to keep the water clean and well aerated. Continue to care for the cutting until it forms approximately six roots that are 1 to 2 inches long. It is then ready for planting.