Planting one or two seeds in each slot is tedious work, but it's far less tedious than transplanting seedlings from a cottage cheese carton filled with zillions. Pour the seeds into a saucer. Using a toothpick and a saucer of water, dip the toothpick in the water and then into the seeds, trying for just one. As you dip the toothpick into the slot of soil, take care not to plant it too deep. Shallow is better than deep.
More seeds fail to germinate from being water logged than from being dry.
Check the seed packet as to whether this seed needs light to germinate and the germination temperature. Set the thermostat. Check for germination every day. As soon as there are visible signs of seedlings, place the tray four inches under fluorescent tubes in a room with a temperature of about 55 degrees. Higher temperatures will produce a tall, weak seedling.