If you're mounting a power board or other small item to the wall, a quick scan and printout of the drill holes might save your sanity.
As Apartment Therapy points out, the printout makes drilling quick and easy. No more awkwardly trying to line up the mounting holes with the screws: Just tape the printout to the wall and drill through the template. Brilliant!
(An alternative, if you don't have a scanner or it's not big enough, is to use a piece of paper to mark the drill holes and then use that as the template.)
Smart & Simple Tip: How To Use a Scanner to Make Wall Mounting Quick and Easy [Apartment Therapy]