Here's how I'd do it. First, make sure you have all the supplies you need. You'll need some sturdy ladders, a bucket full of lights, and a few spools of extension cords. Then, start by hanging the lights along the edge of the roof. Work your way up and down the roof, making sure to keep the spacing consistent and the lights evenly spaced. It's also a good idea to anchor the lights to the roofline with zip ties or screws to make sure they stay in place.