I was recently over at my FSIL's place (who is getting married to FH brother next week!) and they had box's of wedding gifts that they haven't opened yet. I always thought you opened the gifts as you got them in. Especially if it is a card that might have a check in it, you want to open it and cash the check right away so the persons check book is balanced.
Though i have heard it's bad luck to use a gift before the wedding....
So what are ya'll doing? Opening them as they come in or waiting till after the wedding with everything else?