To care for a Christmas cactus, it's important to keep it in a bright, sunny location, but not in direct sunlight. Water it regularly, but make sure the soil is well-drained and not too wet. They also require humid environments, so mist them occasionally. Fertilize once a month during the growing season, but not during the winter months. Finally, repot every couple of years to ensure the roots have enough space to grow. With a little bit of care and attention, your Christmas cactus will thrive!