I can’t begin to tell you how many holes used to be hiding behind my pictures and decorations that had two hooks, until I figured out this simple fool proof method.
Start by laying a piece pf painters tape across the back of the frame. Then mark where you want the nail to go.
Move the tape from the frame to the wall where you want to hang it. (Check that the tape is not crooked with a leveler)
Hammer your nail or hook into place on both sides and then remove the tape.
Attach your decoration or frame to the wall! Easy Peasy!