To save yourself time with licking the envelopes, you might consider stickers. You can purchase round stickers with your last initial or a rose or heart. These can be found at the stationery store or where you are purchasing your invitations. Another option is to purchase glue sticks to seal the envelopes.
Save-the-date stickers are also a good option for your guests to stick them into their little organizers or appointment books. Remember your bright and bold colors to catch their eye!
You may also consider doing customized printing on objects that will grab attention. For example, a pinwheel or a fan.
If you are going to use cards and stamps, you might consider creating your own stamp. You can make these stamps online and use your engagement picture. It’s fun and it makes it very personalized.
Since save the date cards are a recent phenomenon, it’s helpful to include an addendum along the lines of ’invitation to follow’. That way, invitees will not mistake the card for the actual invitation because the real invitation will have more details, be more elaborately designed, and more prestigious in general. In other words, your guests won’t think you and your spouse are cheapskates that are as scant on information as you are on cash.