How can you write your address on a postcard?

The more common approach is to use a pen, however, pencils are also acceptable. A more unorhodox method is to use a crayon, which is frowned upon. For the actual writing of the address, you should write the street name, followed by the town name, followed by your county/state. If you are in a foreign contry, you will also need to put the country on. However, why anyone would want to send a post card to themselves is beyond me.