You can use these notecards to write personal messages, thank - you notes, or invitations. Just grab a pen and start writing on the blank inside. When you're done, put your note in the included envelope and send it off. Since they're made of recycled paper, try to keep them away from water to avoid damage. If they get a bit dirty, you can gently wipe them with a dry cloth. Store them in a cool, dry place to keep them in good condition.