To take care of your Christmas cactus, make sure it gets enough sunlight during the day. It likes bright, indirect sunlight, so placing it near a window is ideal. Water it regularly, but don't overwater it. Let the top layer of soil dry out between waterings. Also, fertilize it regularly with a balanced fertilizer. Feed it in spring and summer, and stop feeding it in fall and winter. Lastly, prune it regularly to maintain its shape and encourage new growth.