Something Funny To Write On A Wedding Card 50th Wedding Anniversary - Help With A Letter/card?

50th Wedding Anniversary - help with a letter/card? - something funny to write on a wedding card

Hey guys,
I need a letter or a card for a 50th To write wedding day very good friends. They asked her daughter, share memories and funny stories too loud, read it. I have a few memories, but I do not know how to begin the letter and start telling stories. In other words, I have no idea how to prepare the letter, as I have never that before.
I hope you can help ... everything is appreciated!
Thanks in advance!