A handwritten letter does something a WhatsApp message rarely can, it leaves a physical trace of a moment, a feeling and the person who took the time to write it.

On World Letter Writing Day, observed on September 1, the old-fashioned art of putting pen to paper offers an unexpectedly modern idea: meaningful communication does not always have to be long, formal or sent through the post. Sometimes, a few handwritten lines are enough.

From a tiny note tucked inside a friend's book to a postcard sent from a holiday, there are plenty of ways to bring letters back into everyday life without turning them into lengthy pages of prose.

1. Write a three-line letter

Forget elaborate openings and long paragraphs. Write just three lines, something you remember about the person, something you appreciate about them, and one thing you want them to know. It takes minutes, but can be kept for years.

2. Turn a postcard into a personal message

A postcard does not have to come from a faraway destination. Pick one up from a local bookstore, museum, or stationery shop and write a message on the back. It becomes a tiny keepsake carrying both a picture and your words.

3. Leave a surprise note

Letters do not always need stamps and envelopes. Slip a handwritten note into a lunchbox, a notebook, a coat pocket or a favourite book. A simple 'I hope you have a good day' can become an unexpected little moment of happiness.

4. Write a 'read this later' letter

Write to someone before an important moment in their life, a new job, an examination, a birthday, a move or a difficult week, and ask them to open the letter on that particular day. The anticipation becomes part of the gift.

5. Create a jar of tiny letters

Instead of writing one long letter, write several small ones. Label them 'Open when you miss me', 'Open when you need a laugh ', or 'Open when you need some encouragement'. A collection of little messages can become a personal time capsule.

6. Send a letter to your future self

What does your life look like today? What are you worried about? What are you hoping for? Write it all down, seal the letter and choose a date in the future to open it. Years later, the letter can offer a snapshot of who you once were.

7. Give the letter a digital twist

Modern letter writing does not have to mean completely abandoning technology. Add a photograph, draw a tiny illustration or include a QR code linking to a playlist, video or digital photo album. The handwritten page becomes the physical doorway to a much larger memory.

The appeal of a letter today may be its very lack of speed. A message can be typed, edited, and sent in seconds.

A letter demands a pause: choosing the paper, picking up a pen, finding the right words and physically sending them on their way.

That effort is what makes even a short letter feel personal.

On World Letter Writing Day, the challenge, therefore, need not be to write a ten-page confession or recreate the correspondence of another era.

Write five lines. Write to someone you miss. Write to someone you love. Write to your future self. Then let those words exist somewhere outside a screen.

Because sometimes, sending a little piece of yourself means simply leaving it on paper.