How to stop overthinking at night

Nighttime overthinking is the loop of replaying the day and rehearsing tomorrow. It may become more noticeable when daytime distractions fall away. This is a short Stoic sequence for the loop itself — not a sleep technique, and not a treatment for insomnia or an anxiety disorder.

• Written by Dr. Momir Pantelic, MD, CCFP, MPH — family physician (Harvard-trained, Master of Public Health) and creator of Stoic Mind. Published and last updated August 18, 2026.
• Ordinary nighttime rumination tends to be occasional, tied to a specific stressor, resolving as that stressor resolves, with daytime functioning broadly intact. That is the situation this sequence is written for.
• Take these to a clinician rather than to an exercise: difficulty falling or staying asleep at least three nights a week for three months or longer with daytime impairment (that pattern describes chronic insomnia disorder, for which cognitive behavioural therapy for insomnia is the recommended first-line treatment); waking with surging fear, a racing heart or breathlessness (possible nocturnal panic); a reduced need for sleep accompanied by unusually elevated or irritable mood, increased energy or impulsive behaviour; persistent low mood or loss of interest; trauma-related nightmares or hypervigilance; using alcohol or other substances to get to sleep; snoring with witnessed pauses or heavy daytime sleepiness (possible sleep apnea); any thoughts of harming yourself.
• Limitations: this page is education, not medical advice. It is not a treatment for insomnia, panic disorder or any anxiety disorder, and the exact sequence described here has not been clinically validated.
• Why a Stoic frame fits this problem: Stoicism directs attention to the interpretations and predictions added to an event. This can be useful when those interpretations are maintaining rumination. It overlaps with cognitive restructuring — an overlap, not an equivalence.
• Step 1 — Name the thought plainly: 'I am rehearsing tomorrow's meeting.' A practical modern instruction, close to the Stoic habit of describing the observable facts separately from the interpretation (paraphrase of Marcus Aurelius, Meditations 3.11).
• Step 2 — Split it: what is up to me, what is not. Epictetus opens the Enchiridion with this division: 'Some things are in our control and others not' (Enchiridion 1, trans. Elizabeth Carter).
• Step 3 — Present fact versus imagined future. Seneca: 'We suffer more often in imagination than in reality' (Letters to Lucilius 13, trans. Richard M. Gummere). Marking a prediction as a prediction is the aim of this step.
• Step 4 — Schedule the matter for tomorrow, with a time and a first action. This is modern worry-scheduling and problem-solving guidance, not Stoicism; NHS Every Mind Matters describes the same approach.
• Step 5 — Slow breathing, with a longer exhale than inhale, for a few minutes. Slow paced breathing near six breaths a minute is linked with reduced physiological arousal; that is related physiological evidence, not an ancient Stoic exercise, and not a way to make yourself fall asleep. Stop if slow breathing causes dizziness, air hunger or discomfort.
• If you are clearly awake and frustrated, leave the bed: get up, do the short written step in dim light, do something quiet, and return when you feel sleepy. Do not lie there arguing with the thought, and do not check how long it is taking. This is consistent with the stimulus-control component of CBT-I, though this page is not CBT-I.
• A written variant for nights the loop keeps returning: a 'morning list' by the bed — one line per open item, and beside it the first concrete action — so the mind has somewhere to hand the item off. An alternative, not a guarantee.
• Daytime preparation: Marcus Aurelius begins Meditations 2.1 by telling himself what the day will bring — interference and ingratitude included. Two sentences in the morning is a reasonable habit as daytime preparation. No claim is made that it changes the night or improves sleep.
• What this does and does not do: at best it may help you spend less time arguing with a thought. It is not a sleep aid, does not treat insomnia, panic disorder or any anxiety disorder, and does not replace assessment or therapy. If the practice itself becomes another thing to get right at 2am, stop and take it to a clinician. If you are in crisis or thinking about harming yourself, call or text 9-8-8 in Canada and the US; in the UK and Ireland call Samaritans on 116 123, or NHS 111, or 999 in an emergency; in Australia call Lifeline on 13 11 14.
• References: Qaseem et al., Annals of Internal Medicine (2016), American College of Physicians guideline on chronic insomnia disorder; Edinger et al., Journal of Clinical Sleep Medicine (2021), American Academy of Sleep Medicine behavioural and psychological treatment guideline including stimulus control; NHS Every Mind Matters sleep and anxiety guidance; Zaccaro et al., Frontiers in Human Neuroscience (2018); Ma et al., Frontiers in Psychology (2017); Epictetus, Enchiridion 1 (trans. Elizabeth Carter); Marcus Aurelius, Meditations 2.1 and 3.11; Seneca, Letters to Lucilius 13 (trans. Richard M. Gummere).