A few tips I learned from my third shower: spend the most money on food & flowers, and print everything from vistaprint when they have a sale! Standard business cards, on plane paper (which you can design yourself) make for unique answer/ response cards.
Here are the latest appointment cards for my dad's dentist office. The front features his latest logo on top of a molar pattern background. If you're ever in Delaweare you can check them out in person by going here!