Loosen the spokes on the side of the tire slightly using the spoke wrench. Adjust the spoke directly where the bend was along with 2 or 3 spokes on each side of it. Try to keep each adjustment around 1/4 to 1/2 of a turn to avoid tightening or loosening a spoke too much.

The nut you are tightening is screwing onto the spoke, so if you turn it counter-clockwise as you are looking down on it, you are tightening the spoke.

Go back and tighten the spokes that connect to the opposite side of the tire using the same technique.

As you complete this step, you should see the rim moving in the direction that you are tightening the spokes; however, you may have to repeat this step many times before the rim is perfectly straight.