The first year we were married, we were given a silver bell ornament from a local jewelry store.
It was so beautiful and looked quite out of place with our other dollar store tree trimmings. But since it was for our first Christmas together, we decided to get one every year. So no matter what else is purchased for Christmas, even if it is the only thing (and there have been some years like that), we add a bell to our tree.
They are Reed and Barton silver plated bells. Each one has the year and "Holly Bell" engraved on it. And the pattern is always holly but always different, as is each year they represent.
I love looking at the dates and remembering the joys and struggles of each year as I add them to the tree.
This year we will add our 22nd Holly Bell to the tree on Christmas morning.