What are the best ideas you've heard to put a special touch on a wedding?

I’ve heard of the preacher after asking the groom to kiss the bride, turn to the audience and ask for all the grooms to kiss their brides. I’ve heard of asking for donations to your favorite charities instead of wedding gifts.

What ideas have you heard/used? Did they seem to work in the wedding or were they cheesy? I’m a matron of honor and need to help this bride think of everything there is to consider!