Packaging And Embellishments: If you're adding embellishments, or you're mailing more than just an invite plus an RSVP card (we opted to mail more info, because of the destination aspect), keep track of the weight of your invitation suite once it's all packed up. Depending on its size, you may be facing more postage fees than a simple stamp will cover. You can get a postage estimate using a kitchen scale and checking on the USPS website. Through the USPS website I also learned that square invites and envelopes cost more in postage, by a significant amount. It's not worth it.
Then order lots of samples, as you might totally change your mind when you see them, or suddenly be inspired by the best bits of different samples. The Wedding Crafter's 'Design your own wedding invitations kit' is a pack designed to give beginners chance to have a play with different card shapes, inserts, ribbons and embellishments that can be tailored to suit any wedding colour scheme.