If you want to keep a real Christmas tree alive, it's important to choose a healthy tree and to keep it well-watered. Make sure the trunk of the tree is freshly cut and that it stands upright in a sturdy stand that allows water to flow freely. Keep the tree away from heat sources like fireplaces or radiators and make sure it has plenty of fresh air. Finally, make sure the tree is well-maintained and that you check the water level regularly. With these tips, you can keep your real Christmas tree alive and thriving for many years to come!