To keep a real Christmas tree alive, you must provide it with a few basic necessities. First, place the tree in a sturdy, water-holding stand that will keep it upright and stable. Next, add water to the stand, filling it to the appropriate level, and make sure to keep the water level topped off as needed. Finally, place the tree in a cool, draft-free location and keep the temperature inside the home between 65 and 75 degrees Fahrenheit. With proper care, your real Christmas tree can stay alive and thriving for the entire holiday season.