Water the lawn with about an inch of water two days before using the lawn plugger.
Start the plugger, following the instructions.
Drive the plugger to the location where you are aerating the lawn.
Engage the plugging mechanism.
Drive the plugger across the lawn. When you reach the end of the lawn, disengage the plugging mechanism and turn the plugger around to go over the next row.
Continue aerating the lawn in that direction. When you have finished, make a second pass in the opposite direction. (If the first pass is east-west, make the second pass going north-south.)
Leave the plugs on your lawn. They will break apart in about a month.