I made a cradle for a Sharpie marker and clamped it to the fork so that it pointed to the center of the portion of the rim that was swept by the brake pad. I adjusted the pen so it barely cleared the "good" portion of the rim. When I spun the wheel, the Sharpie left a mark on the rim where it was "high." I adjusted spokes on the marked portion of the rim starting with one spoke before the mark and going through one spoke after the mark. Primitive, but it got me back on the road.