The Right Way to Hang Art Every Time & Not Screw It Up

I have always loved art and thought that it was the most personal part of any home, but I never knew how to make it all look good on the wall. Then a friend gave me a great tip that to this day has made picture hanging a simple, gratifying task. The tip? Always hang your artwork at 57" on center. Confused? "On center" means that the middle of the artwork is always at 57" (obviously, this only applies to hanging art on an open wall or above lower furniture, rather than over taller features like a...