The most important thing is to make sure the tree has enough water. Water is essential for keeping the tree alive, so you should water it daily, making sure the water level is always at least an inch above the base of the trunk. You should also keep the tree away from heat sources like fireplaces, heaters, and radiators, as they can dry out the tree quickly. Additionally, it's a good idea to keep the tree away from direct sunlight, as this can cause the needles to dry out and fall off.