Abstract: Multiple variations on a novel device and method for improving golf-putting skills are disclosed. Specifically, the present invention relates to the construction and use of an asymmetrical golf-putting target zone that encourages users to direct putts to land within a specific two-putt range on the high-percentage side of the cup, where the high-percentage side is determined by the slope and pitch of the putting surface. The motivation for the asymmetry is disclosed, as are the principles for constructing, implementing, and using the asymmetrical zone. Specifically, the axis separating the asymmetrical subregions of the zone is placed either approximately perpendicular to, or approximately coincident upon, an ideal line of the ball's approach and is oriented such that the larger subregion is placed on the side of the cup with the higher elevation, or on the side of the cup further away from the putting location if the putting surface is flat.