Save the petals from bouquet put them inside a Christmas ornament. Makes great gift. ALso can use your wedding bouquet flowers to make First Christmas Together Ornament--use a paint pen to add names, date, etc
"Stones and Rocks DIY Wedding guest book". Guests write messages to bride and groom on rocks with Sharpie instead of signing traditional guest book. This would be cool to put in giant glass vases on either side of the fireplace once the wedding was over.