To make your Christmas tree last longer, keep it well hydrated. Make sure to water the tree regularly, and keep it away from heat sources such as radiators or fireplaces. Also, make sure to keep the tree away from direct sunlight, which can cause it to dry out quickly. Additionally, try to keep the tree away from drafts, as this can cause the tree to dry out faster. Finally, make sure to regularly trim the tree's branches and keep it looking fresh.