The tradition: Usually a musical performance as you sign on the dotted line.
The twist: With gentle music, people tend to talk over it, glad for a gossip after sitting in silence, so if you want to raise the rafters with a choir male voice, gospel or Glee-style go for it. Give your groom a pen engraved with your married names, sign the register with it and bring it out for those milestones in your lives together: writing thank-you cards; Valentines cards; invitations to your childrens christenings. If theres space, include a note of thanks to guests or quote on the last page of the order of service we love the bride who chose the line A lifetime with you is like some heavenly day by Bob Dylan. Guests will have had time to read while youre busy sealing the deal.
The aww factor: If you have musical guests, an acoustic guitar performance from a cousin or an a cappella song from your BF should have you wiping away a tear, not to mention everyone else.