After getting your items together, take the crumpled brown paper and put it in the bottom of the container
Cover the bag completely with the moss. Make sure that the moss looks lumpy and "natural" looking
Add the ornaments and arrange them to your preference. Helpful hint: more silver/non red towards the outside to provide balance for the next step. Also make sure to fluff the moss.
Add berries on the outside of the arrangement and make sure that you have them sticking out at various angles to keep the more natural look. Pull some moss up & around some of the balls for balance
Add it to your table and style some accessories for height if you're not placing it in the center of a dining table.