One nice touch is to use stars hanging from the ceiling. You can purchase these at party shops for very little money. It depends on your taste, but one couple I know used the Special Edition Return of the Jedi celebration music and it was a hit. For the recessional I would recommend the star wars theme or the Princess Leia theme. Whatever music you chose for the recessional it should not be too stringy but instead show the joy you are feeling as a newly married couple.
Many traditions involve the guests throwing something on the newly married couple.
Instead of rice or birdseed, throw little silver confetti stars. You can get these in bags quite easily, though they are harder to clean up afterwards.