There is something so simple yet so personal about incorporating your initials into your wedding day.  You can use them as your personal wedding “brand” by incorporating your initials into your invitation monogram, paper goods, and decor, or simply hang your initials from a nearby tree or in your DIY photo booth (which is what I did).  I bought craft letters from Paper Source, spray painted them, and hung them with ribbon that matched the ribbon on our programs and other elements.  You can cover them in fabric, flowers, or whatever you can think of.  Anthropologie has metal and fabric letters if you don’t want to DIY and don’t mind spending some money.