Great question! Hanging Christmas lights outside a tree is a fun way to add some festive sparkle to your yard or front porch. To get started, you'll need a ladder, a string of lights, and some light clips or hooks. First, make sure your lights are plugged into an outdoor outlet and turn them on to make sure they're working properly. Then, climb the ladder and start attaching the clips or hooks to the branches of the tree. Once you've finished attaching the clips or hooks, you can start wrapping the lights around the tree. Make sure to evenly distribute the lights and keep them close to the branches for a fuller look