Smooth and graceful is key. If you make a large correction, you just told the judges “I screwed up!”

Move the plane in or out across the entire length of the box. If you get off line on a downwind turn around, try and aim for the correct upwind turn around point. Use the center maneuver and upwind maneuver to sneak back in.

Use the rudder to steer to that point...don't use the ailerons for heading corrections!