The best way to keep your puppy away from the Christmas tree is to make sure that you set up a barrier around the tree, such as a gate or a baby gate, so that the puppy cannot get too close to it. Additionally, you can provide the puppy with other toys and distractions to keep their attention off of the tree, such as chew toys or puzzle toys. Make sure to monitor the puppy closely when they are near the tree, and be ready to redirect them if they start to get too close. With a little patience and effort, you should be able to keep your puppy away from the tree and out of trouble.