Just press the screw through one end of the paint stirrer so it's sticking out the other side. If you're using picture wire to hang your art, hang the art from the flat end of the screw, and position the art where you want it on the wall, making sure it's level. Then take the art down and press the screw through the wall to mark the hole where the final nail or screw will go.
The tip is described in the context of trying to get the IKEA Ribba frame to mount on a wall cleanly, but the idea would work with anything you're trying to hang evenly. What do you think, useful trick or would you just buy a Hang and Level instead? Share your thoughts in the comments.
Frame Hanging Hack: How to Get IKEA Ribba Frames to Behave [View Along The Way]