The best way to water a real Christmas tree is to make sure that the tree has enough water to keep it healthy and vibrant. Place the tree in a stand that will allow the water to flow freely through the trunk, and then add water to the stand until it reaches the base of the tree. Make sure to check the water level daily and top it up if needed. It's also important to keep the tree away from heat sources, such as fireplaces and heaters, as these can dry out the tree quickly. With proper care, your real Christmas tree can stay fresh and healthy throughout the holiday season.