Putting lights on a Christmas tree is an important part of the holiday season! Start by picking a style of lights that you like, such as clear, colored, or mini lights. Then, plan out your design, like where you want the lights to go and how you want them to hang. Use a ladder or stool to reach higher spots, and remember to take your time and be careful. When you're done, make sure to check that all the lights work and look great!