Diary-keeping is not for everyone but, like eating vegetables, it might be a healthy practice.

A Harvard grad student, Ting Zhang, published a study in Psychological Science showing that we value records we make of ordinary life events more than we predict we will.

"What is ordinary now actually becomes more extraordinary in the future," Zhang says.

Certainly every mundane snippet I managed to record of my son's early years has made me happier than I imagined it would when I re-read them.

Along those convoluted lines, here's an idea from the logbook: An image-a-day diary.

The only thing I can make out in this diary is “Bowie R.I.P.” on January 15, 2016. The rest obviously has meaning for Chris alone. As he explained to me, these images are mostly ordinary moments; an inspiring painting he saw at the Met, or the surprise street-siting of a friend.

To me it's a pretty collage of postage-sized images on a grid.

And that's as it should be; even though Chris lives with snoopy me, his diary is relatively private.

For what it's worth, then, I present this pre-Valentine's Day idea for capturing ordinary memories you will likely treasure forever.