Ah, hanging Christmas lights is a wonderful tradition! To hang them outside, you'll need a ladder, some zip ties, and a bit of patience. First, carefully climb the ladder and find a sturdy spot to attach the lights. Use the zip ties to secure them to the roof or eaves. Then, begin stringing the lights along the desired path. If you're feeling adventurous, you can try creating a festive pattern or design. Don't forget to plug them in to make sure they work before you climb down the ladder! Happy hanging!