The first step to hanging your Christmas tree lights is to prepare the tree itself. Make sure it's placed in the right location and has enough space to accommodate the number of lights you plan to use. Next, start at the top of the tree and work your way down, wrapping the lights around the branches in a spiral pattern. Be sure to evenly distribute the lights around the tree, so it's evenly lit and doesn't look too bright in some areas and too dim in others. Finally, make sure to check that all the lights are working properly and that there are no loose wires or broken bulbs.