How to fall asleep fast
Last reviewed: 14 September 2026
Almost everything written on this subject promises a trick. The honest version is that one approach has good evidence behind it, several are plausible, and one popular method is a book claim from 1981.
10–20 minutes is normal
Taking 10 to 20 minutes to fall asleep is healthy. Falling asleep in under five minutes usually means you are sleep-deprived, not that you are good at sleeping.
That matters because most advice on this subject is aimed at the wrong target. If you routinely take an hour, the problem is worth solving. If you take twenty minutes, nothing is wrong and trying to speed it up tends to make it worse.
The reason trying harder backfires
Sleep is one of the few things that recedes when you pursue it. Effort raises arousal, and arousal is the opposite of what sleep onset requires — so "I must fall asleep" reliably produces more time awake. Sleep clinicians have a name for the resulting loop: anxiety about not sleeping becomes the thing keeping you awake.
This is why the technique with the best evidence behind it is not a trick for falling asleep faster. It is a rule about what to do when you are not falling asleep.
What actually works
Get out of bed after about 20 minutes
The NHS advises that if you are still awake after roughly 20 minutes, get up, do something relaxing in dim light, and go back when you feel sleepy. Do not clock-watch — judge it by feel.
This is stimulus control, a core component of cognitive behavioural therapy for insomnia, and it is among the best-supported behavioural sleep interventions there is. The logic is associative: every hour spent lying awake in bed teaches your brain that bed is a place for being awake. Getting up protects the association rather than eroding it. It feels counterproductive for the first week and then it works.
Keep a fixed wake-up time
The strongest lever on how quickly you fall asleep tonight is what time you got up this morning. A consistent wake-up time builds reliable sleep pressure and anchors the body clock; lie-ins scatter both.
Get daylight in the morning, and dim the evening
Morning light pulls your body clock earlier, which makes an earlier bedtime feel natural instead of forced. Evening light does the opposite.
Write the worry down before you get into bed
The NHS suggests noting your concerns or tomorrow's tasks before sleep. It works because a racing mind at 11:00 PM is usually running an open loop, and putting it on paper closes it. Do it at the desk, not in bed.
The popular techniques, honestly assessed
| Technique | Verdict |
|---|---|
| Stimulus control (get up after ~20 min) | Strong evidence. A core part of CBT-I and the NHS's own advice. The one to start with. |
| Paradoxical intention (try to stay awake) | Reasonable evidence. A recognised CBT-I technique. Deliberately trying to keep your eyes open removes the performance pressure that is causing the problem. |
| 4-7-8 breathing | Plausible, thinly evidenced. Slow breathing with a long exhale does reduce physiological arousal, which helps. There is little research on it specifically for sleep onset. Harmless and worth trying. |
| The "military method" | Popular, not well evidenced. The claim that it puts you to sleep in two minutes traces to a 1981 book, not to research. It is progressive muscle relaxation with a visualisation, which is a reasonable relaxation exercise — just not a switch. |
| Progressive muscle relaxation | Decent evidence as a relaxation intervention, and often included in CBT-I programmes. |
| Counting sheep | Probably counterproductive. It is boring enough to leave room for the worry you were trying to displace. A more absorbing mental task works better. |
None of these is a trick that overrides the basics. If you are going to bed at an hour your body clock disagrees with, or on eight hours of caffeine, no breathing pattern will fix it.
What to do tonight
- Stop caffeine by early afternoon. Half of a 3:00 PM coffee is still in you at 9:00 PM.
- Skip the nightcap. Alcohol shortens the time to fall asleep and then wrecks the second half of the night.
- Dim the house an hour before bed, and get work and screens finished before the wind-down starts rather than as part of it.
- Cool the bedroom. Core temperature has to fall for sleep to consolidate.
- Go to bed when sleepy, not when it is "bedtime". Lying in bed awake is the habit worth breaking.
- If you are still awake after about 20 minutes, get up. Dim light, something dull, back when sleepy.
The NHS advises seeing a GP or doctor if changing your sleep habits has not helped, if you have had trouble sleeping for months, or if it is affecting your daily life. Also see a GP or doctor if anyone has noticed you gasping, snorting or choking in your sleep — that points at sleep apnoea, which no amount of sleep hygiene will fix.
Sources. Self-help advice follows NHS guidance on insomnia, sleep and tiredness, alongside the American Academy of Sleep Medicine's recommendations. Cognitive behavioural therapy for insomnia (CBT-I) is the treatment the NHS recommends for persistent insomnia. This page is general wellbeing information, not medical advice — see a GP or doctor if sleep problems have lasted months or are affecting your daily life.
Common questions
How long should it take to fall asleep?
10 to 20 minutes is normal and healthy. Regularly taking under five minutes usually indicates sleep deprivation rather than good sleep habits. Regularly taking more than about 30 minutes is worth addressing.
What is the fastest way to fall asleep?
There is no reliable switch. The approach with the best evidence is stimulus control: go to bed only when sleepy, and if you are still awake after about 20 minutes, get up, do something relaxing in dim light and return when sleepy. It feels counterproductive at first and then works.
Does the military sleep method work?
It is progressive muscle relaxation combined with a visualisation, which is a reasonable relaxation exercise. The specific claim that it makes you sleep in two minutes comes from a 1981 book rather than from research. It is harmless to try, but it is not the switch it is sold as.
Does 4-7-8 breathing help you sleep?
Plausibly. Slow breathing with a long exhale reduces physiological arousal, which is helpful at bedtime, but there is little research on this pattern specifically for sleep onset. Worth trying; not a cure.
Why can't I fall asleep even though I'm tired?
Commonly a body clock that is out of step with your bedtime, caffeine or alcohol, or the anxiety loop where worrying about not sleeping keeps you awake. Being tired and being sleepy are also different things — fatigue from a long day does not always come with sleep pressure.
Is it bad to lie in bed awake?
Regularly, yes — it teaches your brain to associate bed with being awake, which makes the problem self-sustaining. That is precisely why getting up after about 20 minutes is the recommended response.