So I found this idea to do "Words of Wisdom" cards, and I LOVE it as a guest book alternative. http://www.marrythis.com/free-printables/freebie-friday-guest-book-cards/
There area lot of other examples out there, and ways to do them, but that was my inspiration. We are printing them at home on 3x5 index cards with our own colors, and with a couple of string "laundry lines" and clothespins to hang them up once they've been written on, kind of like this http://mountainsidebride.com/wp-content/uploads/2010/05/quilt-e1274011497437.jpg
I really like the wording of the cards from the inspiration page, but I want to come up with a couple more.
So we have:
Marriage is...
We wish you...
Don't forget...
Love is...
So the object of this is short, simple, and leading. I thought about something directed at each the bride and groom about the other person (i.e. "Groom, the thing to remember about Bride is...") but I can't figure out a way to make it short and sweet like the rest of theme.