To make your Christmas cactus bloom, you'll need to provide the right conditions for growth. First, make sure the plant is in a spot that gets bright, indirect light. Keep the soil moist but not wet, and fertilize it regularly with a balanced fertilizer. Lastly, you can try giving it a little nudge by exposing it to cooler temperatures for a few weeks during the fall. With a little care and patience, your Christmas cactus should be in full bloom in no time!