Fun guestbook alternative idea - create a page for guests to fill out during the reception that will go into a book later - page includes places for guest's name & address, special thoughts, advice, and even a "self-portrait"!
Another DIY wedding decor idea that is cheap and so pretty just fill mason jars with baby's breath or inexpensive flowers and line the aisle with them hanging off the chairs. I love the burlap and twine on the jar too.
"At the bottom of the cake, hide whatever the groom likes. sports mascot, band logo, anything". or Spiderman. Always Spiderman. "Because it's just as much his day as it is yours" and Spiderman is awesome