Place your corn seed in a large bowl. The bowl should be large enough to hold the seed you are priming with an inch of water standing on top of it.
Fill your bowl with warm water. The water should be at least an inch deep above the seed you are soaking.
Let the seeds set overnight, no longer than 12 hours.
Drain the water from the seeds using a colander.
Dry the seed on a paper towel or dishtowel.
Sow the seed. It's important that this be done the day after the corn seed was soaked. If you wait longer, the seed may start to germinate, which shouldn't occur until the seed is in the ground.