Display your collectibles in clusters or groupings to create a theme. Think big & display them en masse & make a grand statement. A fireplace & mantel is a perfect place to display your family photos, collectibles, ornaments, a tall vase with willow or dramatic fresh flowers, or holiday decorations. (text link to Christmas decorating).
Are there any home decorating styles that you like, or that you tend to gravitate towards that can give you a general direction? Perhaps its Country or Rustic, Mediterranean or Tuscan, Asian, Classical, Contemporary, or a combination of some? Which do you or would you feel most comfortable in every day?