Perfect power-strip hanging trick
Lining up protruding screwheads with the keyhole mounting slots on the back of a power strip can be a frustrating trial-and-error process. Here's a foolproof trick that works the first time: Lay a piece of paper over the back of the power strip and, using the side of a pencil lead, make a rubbing of the slots to create a template.
With your pencil, punch a hole through the template where the screws would go. Now tape the template to the mounting location and drive screws through the template holes.
—Serge Duclos, Delson, Que.