How To: Hang a Frame Without Leaving a Mark — Command Picture Hanging Strips by To install the strips, attach them to the frame and to the wall, let them rest for at least 30 minutes, and stick them together.
Where have you been all my life? Pop top as picture hanger. Ive done this for years, started it in college when I didnt have hangers too lazy to get some. Why do that when you have all those leftover beer cans.and an idea.
Hammer nail through a wooden ruler. Hang picture on that nail. Line it on the wall where you want it. Remove picture, push in nail to make an indent. Remove ruler, hammer another nail into the wall Hang your perfect picture up.