Plan ahead, order early. It's good to start early when choosing wedding invitations. You and your partner will need time to research and discuss the various choices available for your invitations. If you look early enough, you may even have time to request samples from various companies. Ordering your wedding invitations at least 6 months in advance will give you a cushion of time to allow for printing of the invitations and correction of any errors that may occur in printing. You also need to account for the time it takes to assemble your invitations and mailing them out to give sufficient time for a response. Plan on ordering 20 to 25 extra invitations in case they are needed because of mistakes in addressing the invitations or if you find you need to add additional guests to the list.
There are also many options for mix and match wedding invitations. These are often sets of invitations that have many different options available for each of the pieces of your invitation set, from invitation paper to envelopes, fonts and scripts and more. By hand selecting these choices, you can create an individualized look to your invitations that speaks of the two of you as a couple without having identical invites that someone else has.