To encourage a Christmas cactus to bloom, you should provide it with the proper conditions for growth. Make sure it is getting plenty of indirect light, as too much direct sunlight can cause it to wilt. Keep the soil moist, but not waterlogged, and feed it with a diluted fertilizer every few weeks. Finally, keep the temperature between 60 and 70 degrees Fahrenheit and avoid drastic changes in temperature or humidity. With a little patience and care, you should see your cactus bloom in no time!