Here are a couple of ideas for you, what you could do with your vows after the wedding, so they don't just end up in a box or thrown away....
1) You could have them incorporated into your wedding album or if your having a photo book printed, the words could be added into the book.
2) You could frame your vows in between two black and white photos from your wedding.
3) You could make a coffee table base with glass and put the photos and your vows in the table for all your house guests to see.
I hope you can make use of one of these ideas to preserve your most precious memories!