When you're out of town and can't water your Christmas tree daily, there are a few things you can do to keep it alive. First, if possible, put your tree in a cool room. Second, cut an inch or two off the bottom of the trunk before putting it in the stand. This will help the tree absorb water more easily. Third, use a stand that holds plenty of water and make sure to keep it filled. Fourth, try not to move the tree once it's up; this will cause less stress on the roots and needles. Finally, when you get back home, give your tree a good drink of water and check its base for any needed repairs. With these tips, your Christmas tree should stay healthy and happy until Santa arrives!