Quick summary: A nightly habit of writing three short lines, covering what happened today, what was in your control and the one thing you owe tomorrow, adapts the evening self-review practised by Stoics such as Seneca into something that fits even the worst evenings. Research on expressive writing shows small but consistent benefits, and a sleep laboratory study found that people who wrote a specific to-do list before bed fell asleep faster than those who listed what they had already done. It is not a treatment for severe depression or recent trauma, but as a free, five-minute way to stop the day replaying at bedtime, it is a sensible experiment for anyone under strain.
Lying in bed, the day replays, never in order. It comes back in fragments: the thing you said, the email you didn’t send, the look on someone’s face at lunch. The body is tired and the mind is not. Anyone under strain knows this hour, and knows that the harder you try to sleep, the more awake you become.
An old habit, cut down
The Stoics had a practice for it. Marcus Aurelius kept a private notebook, the one we now call the Meditations. Seneca was more specific. In his essay on anger, he describes waiting until the lamp was taken away and his wife had fallen silent, then passing the whole day in review, noting where he had fallen short and hiding nothing from himself. He was sure of the reward: “how sweet is the sleep which follows this self-examination”. It was an audit. I use a shorter version now, before sleep. Three lines: what happened today, what was in my control, and what I owe tomorrow.
The pen matters here, because you cannot write at the speed of worry. Thought loops; the hand doesn’t. Writing forces the day into sentences, and sentences have ends. That is the first thing the practice does: it gives the day somewhere to stop. Researchers into expressive writing make a similar point, that shaping an experience into a story may help people break free of the mental cycling of rumination.
What the research says
The evidence behind this is older than the current fashion for journaling. In 1986, James Pennebaker at the University of Texas asked 46 students to write for fifteen minutes a day, four days running. Half wrote about trivial topics, half about the hardest things that had happened to them. In the months that followed, the second group visited the campus health centre less often and reached for painkillers less. Studies since have run the same set-up with people living with asthma, arthritis and cancer, and with chronically stressed caregivers.
The effect is modest. A 2006 meta-analysis of 146 randomised studies found a positive but small average benefit. It also keeps showing up. There are limits: expressive writing seems to help less when someone is living with severe depression or PTSD, and writing about a trauma too soon can leave people feeling worse. Three lines at bedtime are not a treatment.
Three questions, three jobs
The three questions do different work. “What happened today” asks for facts. The story is what replays at midnight: the meeting was a disaster. The facts are smaller and usually survivable: it ran long and two items were pushed to Thursday. “What was in my control” draws a line around the day. Most of what went wrong was not yours to fix, and naming the part that was shrinks the worry to something you can act on.
That second question is the oldest of the three. Epictetus opened his handbook with it: “There are things which are within our power, and there are things which are beyond our power.” It is still the fastest way I know to sort a bad day into its proper piles. A colleague’s mood goes on one pile; the curt reply you sent, and the apology you can make for it, go on the other.
“What I owe tomorrow” turns the whole thing forward. Not a to-do list, just one thing. The day closes in debt to the next, and the next knows where to begin. It also has the most direct evidence behind it. In a sleep laboratory study at Baylor University, 57 young adults spent five minutes before bed either writing a to-do list or listing tasks they had already completed. The to-do group fell asleep significantly faster, and the more specific the list, the quicker they dropped off. Listing finished tasks gave no such benefit, a good reason to keep the first line short.
Why three lines and not a page
The constraint is the point. On a good day you could write a page. On a bad day you cannot, and the bad days are the ones the practice is for. Three lines fit on the worst evenings. I have written mine half-asleep on the edge of the bed, pen running out. A practice that demands a clear head and an hour dies in the first bad week; one that asks for three lines survives it.
I am not a therapist. I am a writer who spent a year testing whether an old Stoic habit could survive a modern schedule. It survived mine. Whether it survives yours, I can’t tell you, but three lines is a cheap experiment.
Theo Huxley writes as the author of “The Emperor’s Journal”, a guided journal that pairs a short Stoic reading with one writing prompt. He publishes the Stoic Sayings.
