The key to keeping a live Christmas tree alive is to provide it with the right care. Start by making sure the tree is well-hydrated, as this is essential for its health. To ensure this, keep the tree's water bowl filled with fresh water and regularly check it to make sure it hasn't run dry. Additionally, avoid placing the tree in direct sunlight or near any heat sources, such as heaters or radiators, as this can dry out the tree and cause it to lose its needles.