That's a good question! First, you'll need to make sure you have the right size lights for your tree. Once you have the lights, start by wrapping them around the bottom of the tree and working your way up. Be sure to spread them out evenly, and try to hide any cords that might be visible. When you get to the top of the tree, make sure to wrap the lights around the trunk to create a nice, even look. If you need help, there are plenty of videos online that can show you how to do it.