A postcard does not require a trip
Choose a card connected to something specific: a street, drawing, colour or detail from your day. Use a purchased card or a homemade one that meets postal requirements. Check size, addressing and postage with the relevant service, especially for international mail. A thick or unusually shaped card may need different handling.
Quietly confirm the address if it may have changed. A postcard has no envelope, so use another form of communication for confidential information. Enjoying physical mail should not obscure the fact that several people may see the message while it travels. Write with that visibility in mind rather than adding details you would not say openly.
For international mail, copy the address in the format used by the recipient and write the country clearly. Leave room for postage and postal markings rather than covering the address area with decoration.
Describe one small scene
Begin with something the recipient can imagine: light in the kitchen, a book open on a train or the sound of a square. Add why it made you think of them. Two or three precise sentences often create more presence than a broad summary of every recent event.
Ask an easy question if you want, without making the card a demand for a reply. 'What are you reading at the moment?' leaves space, while a series of questions about someone's entire life can feel burdensome. You can also end with a thought and no question at all.
Keep the rhythm flexible
Store a few cards and suitable stamps together so every urge to write does not require a shopping trip. Add the date because the card may arrive after the event described. Photograph the message only if you want a private copy for yourself.
Avoid counting how many cards come back. Some people enjoy receiving letters but respond differently or less often. If you want a regular exchange, suggest it explicitly and make declining easy. A postcard can remain an occasional gesture connected to an ordinary day rather than another commitment both people must maintain.
