Every photograph contains things nobody knew would later become important.

A photograph keeps everything indiscriminately, including the background nobody was looking at. The kitchen as it used to be, the person who was still alive, a habit you have forgotten you had. What becomes precious in an old picture is usually not the thing that was being photographed.

Take more pictures of ordinary settings, not just occasions. The room, the street, the everyday arrangement of your life. It feels pointless now and it is the exact material that will matter later, because you have no way of knowing today what will turn out to have been temporary.