Bride & Groom list the things they love about the other and then it is displayed at the reception. Then they could be put in the home and serve as a reminder of how much the other is appreciated and loved.
For MOH duty: Have each bridesmaid, mother, mother-in-law, aunts, etc... create a scrapbook page which includes a letter to the bride along with pictures. This is something she can read while she gets ready. The last page could be from the groom!