Take something you really love, a letter, envelope, photograph, a ticket stub... anything - to a printing place like Kinkos and have them blow it up for you to hang as art. Old recipe from Grandma in kitchen would be great.
Turn Your Wedding Song Into a Work of Art (Tutorial)
I'm doing this! Hope it won't be too hard to find Metallica sheet music, I know they are really stingy when it comes to allowing anyone to sell their stuff other than them. Thanks Lars! Turn your wedding song into a work of art: A Tutorial