What if people wrote personalized notes to each guest (i.e. We had so much fun with you on that ski trip in 2010, we're so glad you're in our lives - thanks for coming out tonight!) because you'll never get to talk to everyone!
This website has a "Recycle Your Wedding" section where brides can sell decorations from their wedding. Worth a look before you buy 80 square vases.... i'll be happy i pinned this one day