Once you've set a date and chosen a location, it's time to let friends and family in on your plans. One ingenious way? A telegram-style invitation suite, which looks remarkably like the real thing. If you can tweet, you can pull off this nostalgic idea. For the save-the-date, visit Telegram Stop's website (telegramstop.com), pen your short message, upload friends' addresses, and hit "send" to have them mailed. Each is less than $4. Invitations are designed through the site, but they'll be sent to you, not your guests. That way, you can insert any special extras, such as maps, and apply your own stamps. Invites are $4 each and come with clever "R.S.V.P." luggage tags. You can continue the retro-meets-modern theme on your honeymoon by sending loved ones your vacation photos as postcards with the Postagram app.