Every week we feature one of our writers and ask them why they write letters.
This week's writer, Justine, flies around the world making Davis Cup tennis great, and when she's not doing that she's usually running or cycling some ultra-distance, but she still finds time to write for us.
Here she tells us why writing letters to strangers just isn't as difficult as you may think.
Need some help to get started on your own letter?
Here are some ideas for opening lines and details of where to send your letters and here are some writing tips.