When caring for a Christmas tree, it's important to keep the water in the stand fresh and topped up. To do this, simply check the water level every day and add more as needed. This will help to keep the tree hydrated and prevent it from drying out. Additionally, you can trim the bottom of the tree trunk by a few inches to help it absorb more water. Finally, be sure to keep the tree away from any sources of heat, such as a fireplace or heater, to prevent it from drying out prematurely.