It's important to let the tree settle for a couple of days to allow the branches to relax and straighten out. This will help to give the tree a natural, full shape and make it easier to decorate. Once the tree has settled, you can start decorating with lights and ornaments. Be sure to use a fresh set of lights and test them before putting them on the tree. Additionally, make sure the ornaments are lightweight and secure so they don't fall off or break.