Another well received way is to print a mini calendar page with a 3-hole punch so your friends can attach it to their own calendars. Of course, you would have to circle or decorate the day that belongs to you.
Do include photos that are relevant to your wedding; and use colors that relate to your wedding. For example, if your wedding venue is to be decorated with white and pink decorations, then use the same color theme for your cards as well.
If you know what your theme or colors are going to be, you can incorporate that into your save the date cards as well. You can also include your engagement picture if you have one. You can have these cards made at a bridal shop or stationery store. You might be able to get a discount if you order the save the date cards when you order your wedding invitations.
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.
Save the date cards can take the form of any message medium, and often do. They sometimes correspond in style to the wedding invitations, or they take the form of refrigerator magnets, brochures, postcards, booklets, or tri-fold letters. The medium is up to you, but the shortness of the message usually lends itself well to magnets or small cards.