Here’s a great project from Curbly: turn a filing cabinet into a rolling kitchen cart. Chrisjob took an old filing cabinet and added wheels, a butcher block top, and towel racks on the side. He even painted it a spiffy shade of blue.
Since kitchen carts are often the wrong size, this is a great way to customize one the way you want. File cabinets are regularly available in thrift stores, too. [Apartment Therapy]