Select the a spoke wrench that fits the spokes on your wheel.

Loosen the spokes that attach to the same side of the wheel as the caliper contact point. At the same time, tighten the spokes that attach to the opposite side of the wheel as the caliper contact point. To start, try a half turn for each of the spokes near the caliper contact point.

In the photo, the red marked spokes are being tightened, and the blue marked spokes are being loosened. This will shift the rim closer to the viewer.

Spin the wheel. Tighten the calipers again until they touch the rim on only one side at a time at certain point. Repeat steps 2-3 until when tightening the calipers, they touch both sides of the rim evenly at every point on the rim.