Did your family have heirloom or cherished ornaments? Did you ever string popcorn and cranberries? Did your family or ancestors make Christmas ornaments?
My mother has a multitude of ornaments her grandmother and other female relatives made over the years. Each year we would hang a few of these on the tree along with all of our Hallmark ornaments from more recent years. The ornaments I love the most are those with a story attached and my mom does an excellent job at picking them out for us year after year. My favorite from last year was the "First Christmas Together 2008" she got for Aaron and I and our first apartment together.
We also tell the story each year of when my grandmother bought each family a pickle ornament and my cousin Jake picked one up and it just crushed in his hand. He had the most crestfallen look ever, but after making sure he was okay, we all just laughed and laughed. Glass ornaments around a bunch of active kids did not work out too well. But they received another of the ornaments at a later date and it became family legend.