Also on these boards
Drive a nail through the wood just enough that you will leave a mark on the wall when pressed. Hang your mirror/picture on the nail, supporting it as needed. Put it in place on the wall and push. You'll have a little mark on your wall where the nail should go. Hammer one in and voila! You now have the perfect way to hang your picture and no measuring needed!
This is life changing! no fancy tools or laser pointer but I do recommend that you use a level to make sure it's placed evenly & will hang straight