Turning your wedding dress into a tote bag (or several!) is a great way to turn your dress into something that you can get a lot of use out of and get to see every day.
You could turn your dress into a beautiful quilt. You might need to add some extra fabric to do it, but this could be a beautiful project that will make a quilt for you to treasure for years to come.
Use plain materials for the base of your cushion, and then decorate the pillows with the trim and embellishments from your dress for a beautiful finish.