Written by the Nuvirox Research Team
Key points
- A 2018 Baylor sleep-lab study found that writing a specific to-do list before bed helped healthy adults fall asleep faster than writing about tasks already completed — but the effect only showed up for a very specific kind of writing.
- Open emotional venting right before bed didn't show the same benefit in trials, and may increase arousal for some people rather than reduce it.
- The mechanism isn't relaxation — it's offloading. Writing down unfinished tasks appears to quiet the working-memory loop that keeps replaying them.
Short answer: yes, but only one specific kind of bedtime writing has real trial support — and it isn't the diary-style venting most people picture. A polysomnography study out of Baylor University found that people who spent five minutes before bed writing a detailed to-do list for the next few days fell asleep meaningfully faster than people who wrote about tasks they'd already finished. The researchers' interpretation: it's not catharsis, it's cognitive offloading. Once a worry is written down with a plan attached, the brain seems to stop rehearsing it.
Why does writing anything before bed change how fast you fall asleep?
Difficulty falling asleep is very often a problem of unfinished business, not tiredness. Cognitive models of insomnia point to pre-sleep cognitive arousal — racing thoughts, rehearsed to-do lists, replayed conversations — as one of the biggest drivers of a long sleep-onset latency (the technical term for how long it takes you to fall asleep once the lights go out).
The idea behind bedtime writing borrows from the Zeigarnik effect: unfinished tasks tend to stay cognitively "active" until they're either completed or have a concrete plan attached to them. Lying in bed and mentally rehearsing tomorrow's obligations keeps that loop running. Writing the same list down on paper, with specifics, appears to signal to the brain that the information is safely stored and doesn't need to keep circulating.
What did the actual sleep-lab study find?
Scullin and colleagues brought 57 healthy young adults into an overnight sleep laboratory and had them spend five minutes, right before the polysomnography recording began, writing either (a) a detailed to-do list of things they needed to do over the next few days, or (b) a list of things they had already completed recently. Everything else about the night was identical.
The to-do list group fell asleep faster. Writing about upcoming tasks — not past ones — was associated with a shorter objectively measured sleep-onset latency. The effect was also dose-dependent in an interesting way: the more specific the list ("email Sarah about Tuesday's meeting" rather than "deal with work stuff"), the stronger the association with falling asleep sooner (Scullin et al., 2018).
That's a genuinely counterintuitive finding. You'd expect writing about unfinished obligations to increase arousal, not reduce it — and earlier research on rumination generally supports that assumption. The proposed explanation is that the act of writing a concrete plan changes the nature of the thought from an open loop to a closed one, even though the task itself is still incomplete.
Does every kind of journaling help — including venting about your day?
No, and this is the honest counterweight worth sitting with. The Baylor trial specifically compared a to-do list against a completed-tasks list — it did not test open-ended emotional journaling or venting about stressful feelings as a bedtime practice. Separate clinical work on insomnia treatment has found that unstructured worry-expression exercises immediately before bed don't reliably reduce sleep-onset problems, and cognitive models of insomnia generally caution that re-engaging with emotionally charged material right before trying to sleep can raise arousal rather than lower it.
The practical takeaway is about timing and content, not journaling in general. Long-form expressive writing about difficult emotions has documented benefits for immune function and psychological processing in other research contexts — but the evidence specifically supports doing that kind of writing earlier in the day, not in the five minutes before you try to fall asleep.
What won't journaling do for your sleep?
It's a sleep-onset tool, not a treatment for insomnia disorder, sleep apnea, or chronic sleep fragmentation. The Baylor study measured how quickly healthy young adults fell asleep on a single night — it didn't test people with clinical insomnia, and it didn't measure sleep quality across the whole night, only the time to fall asleep.
If you're falling asleep fine but waking up repeatedly, or if racing thoughts are part of a broader pattern of anxiety or depression that's affecting your days as well as your nights, a five-minute writing habit is worth trying, but it's not a substitute for talking to a doctor or a therapist about what's underneath it.
How should you actually do it?
Based on the trial protocol: set aside about five minutes before you get into bed (not once you're already lying down), and write a specific, detailed list of tasks you need to handle over the next few days. Specificity seems to matter — "call the dentist to reschedule Thursday's appointment" appears to do more than "health stuff." Keep a notebook rather than a phone or laptop, since screens introduce their own separate effect on sleep. If you want to add anything beyond the to-do list, a few lines of concrete gratitude are consistent with reduced pre-sleep negative thinking in related research — but save any deeper emotional processing for daytime hours.
Frequently asked questions
Does it matter if I type it on my phone instead of writing by hand?
The original study used pen and paper. Using a phone introduces screen light exposure right before bed, which has its own well-documented effect on melatonin timing, so a notebook is the more evidence-aligned choice.
How long before I'd notice a difference?
In the sleep-lab study, the effect showed up the same night — participants who wrote the to-do list fell asleep faster during that single laboratory session. That doesn't mean everyone will feel an instant, dramatic change, but there's no indication you need weeks of practice for the mechanism to plausibly apply.
What if my mind keeps racing after I've written the list?
That's common, and it doesn't mean the exercise failed — a consistent wind-down routine around the writing tends to help more than the writing alone. If racing thoughts are a nightly, persistent pattern rather than an occasional one, that's worth discussing with a clinician, especially if it's paired with daytime anxiety symptoms.
Does this work for a specific high-stress period, like planning a big event?
That's exactly the kind of scenario the mechanism targets well — for example, wedding-planning insomnia is largely driven by the same unfinished-task rehearsal loop this exercise is designed to interrupt.
Is this the same as a gratitude journal?
Not exactly. Gratitude journaling has separate research behind it for mood and general wellbeing, but the specific sleep-onset benefit in this study came from listing unfinished tasks with a plan, not from reflecting on positive events.
From Nuvirox
Why we formulated Sleep+ Restore
Sleep+ Restore pairs 10 mg of melatonin with a blend studied for the hours around sleep — L-tryptophan and L-theanine (amino acids that feed into the body's own calming and sleep-signaling pathways), chamomile and passionflower (traditionally used calming botanicals), ashwagandha, and GABA — plus vitamin B6, calcium, and magnesium.
It comes with a 60-day money-back guarantee — long enough to actually evaluate it the way sleep research suggests you should.
Learn more about Sleep+ Restore →The bottom line
A five-minute, specific to-do list before bed has real, if modest, sleep-lab evidence behind it — genuinely comparable in size to some pharmaceutical sleep-aid trials, according to the study's own authors. What it isn't is a cure-all: it targets one particular driver of slow sleep onset (unfinished-task rumination), it hasn't been tested in people with diagnosed insomnia, and open emotional venting right before bed doesn't carry the same evidence. If lying awake with a racing mind is a nightly pattern rather than an occasional one, pair this with a consistent sleep schedule and a conversation with your doctor if it persists.
References
- Scullin MK, Krueger ML, Ballard HK, Pruett N, Bliwise DL. The effects of bedtime writing on difficulty falling asleep: A polysomnographic study comparing to-do lists and completed activity lists. J Exp Psychol Gen. 2018;147(1):139-146. DOI: 10.1037/xge0000374. PMID: 29058942.
- Harvey AG. A cognitive model of insomnia. Behav Res Ther. 2002;40(8):869-893. DOI: 10.1016/s0005-7967(01)00061-4. PMID: 12186352.
- Tang NK, Harvey AG. Effects of cognitive arousal and physiological arousal on sleep perception. Sleep. 2004;27(1):69-78. DOI: 10.1093/sleep/27.1.69. PMID: 14998238.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.