All guests can sign their names (legibly) on a tablecloth
using a cloth pen. After the reception, the names can be
embroidered.
A bridal quilt can be created by having each guest bring a
square of fabric to the reception.
You can have balloons released after the ceremony, instead
of throwing rice or flower pedals. These balloons can include
a tag with the name of the bride and groom and the marriage
date.
Every guest can be provided with a box containing a
butterfly. The guest can be then be signaled to release the
butterflies at the end of the ceremony.
During the processional, the wedding party may carry
candles (or lanterns). The guest can also light candles during
or after the ceremony, or float their candles in a pond.
Local laws permitting, a display of fireworks can be put on
during a nighttime reception to better commemorate the
occasion.
Display of lights to liven up any nighttime reception.
Place a message in the sky that can be seen during the
ceremony or reception.
At the time the bride and groom are pronounce as wife and
husband, respectively, church bells can be rung.
Every female guest attending the ceremony can be given a
flower.
Your wedding can be viewed via satellite to relatives who
cannot attend the actual event.