Fill your pot 2/3 full with good potting soil. Tamp down the soil and add more if necessary. You want the pot to be firmly full, but not packed. The paper can be planted indoors or outside, so you get to choose according to the temperature and conditions at the time of planting (we don't recommend planting outside if it's blizzarding or desert-hot!).
Take your plantable paper and cover the soil in the prepared pot with the paper. It's okay if the paper overlaps. Spread a 1/8 inch layer of soil over the plantable paper pieces and tamp down gently.
After planting the paper in your pot, give it a good soak. You want the paper and the soil to be nicely damp but not swimming in water. During the first 10 days, keep the paper moist at all times. The water is necessary for germination.
Once sprouts appear, continue to keep the paper moist but be careful not to overwater. Once sturdy plants appear, water as needed. Here's what the pot looks like after planting a greeting card: