I almost always make use of a cookie scoop to create even and uniform-sized cookies which yields the best results. Of course, if you don’t have a cookie scoop then use a regular spoon and roll your cookie balls with the palm of your hands.  Just try not to handle the cookie dough for too long in your hands - the dough needs to still be chilled by the time it reaches the oven so that it doesn’t spread out during baking.