Set the depth of your plow. This will depend on the width of your plow, the condition of the soil, what you are using to pull the plow and when the field was last plowed. Try a depth of roughly 8 inches to start with, and adjust as needed, depending on how difficult that is to plow.
Begin at one side of the field, and plow in a straight line, down the edge of the field. The direction that you plow in will be the direction that your planting is done in. So think ahead to make sure that this direction will work with the rest of your farming process.
Lift the plow out of the ground and turn your horse, tractor or plow around. Get the plow set at the edge of the field, roughly 6 inches to a foot from the first plow line, depending on the size of your plow and plants you plan to seed. Depending on your plow, you may need to plow in the same direction every time. In this case, come back to same side every time to start the plow.
Start back down the line, making sure to maintain an even spacing for the length of the plow line, relative to your first line.
Continue going back and forth across the field in this manner, until the entire field has been plowed.