I've made table centerpieces using fresh pineapple, lemons, pine branches and magnolia leaves per a Williamsburg theme. They're very pretty. I've also done similar things to create a mantle decoration.
One year I filled clear glass cylinder candle holders with fresh cranberries and handfuls of gold beads, then stuck gold metallic taper candles into them. Placed them, in single file, on long mirrors on the dining table and interspersed them with small bits of pine. Very nice, too.
Not sure what I'm going to do this year as this is a new house for me, but Glenn has told me to do anything I want. Gotta love this man!