A method of installing an edging system for a unit pavement system includes inserting a main body section of a plate-like stake in a generally horizontal direction underneath at least one paver unit of the plurality of paver units and into a granular material layer upon which the unit pavement system is supported. The method further includes positioning a vertical section of an edge restraint under a horizontal cap section of the plate-like stake such that the vertical section of the edge restraint is arranged parallel to a vertical section of the plate-like stake and underneath a horizontal cap section of the plate-like stake. The method also includes driving a fastener into a ground surface until the fastener engages a horizontal section of the edge restraint. A plate-like stake including a main body section and a clip, which is separate from the main body section, is also disclosed.