There are several ways to keep a real Christmas tree fresh and healthy. First, it's important to cut the tree from its roots as soon as possible after you bring it home, so that it doesn't lose too much water. Second, you should place it in a cool, well-ventilated area and keep it away from heat sources like fireplaces or radiators. Third, you should make sure to water the tree regularly, keeping the base of the tree moist but not soggy. Finally, you should remove any decorations that may be blocking the tree's ability to take in water.