What kinds of postcards do you receive in the post? You can design interesting postcards aimed at getting a message to your audience. The postcards can be created as individual works of art or mass-produced using computer applications and printers.
They can be posted or hand-delivered. They can be given to other people to mail to friends. Postcards can be left in places where people can pick them up. They can be placed on pinboards in offices or shops that have them for this purpose.
You could even make electronic