Last updated: August 2026
Lying awake with a tired body and a busy head is one of the most common sleep complaints in the UK. The fix is rarely one trick; it is a cooler room, a calmer last hour, a few techniques that switch the mind off, and a bed that does not wake you back up.
Quick answer: To fall asleep fast, keep your bedroom around 18°C and dark, stop caffeine at least six hours before bed and screens an hour before, and use one technique to quiet your mind: the military method, 4-7-8 breathing, or paradoxical intention (trying to stay awake). If you are still awake after about 20 minutes, get up, do something dull in dim light, and go back when sleepy. Most good sleepers take 10 to 20 minutes to drop off, so aim for that rather than instant sleep.
How long should it take to fall asleep?
It should take between 10 and 20 minutes to fall asleep. Dropping off in under five minutes usually means you are sleep-deprived, and regularly taking more than 30 minutes is the sleep-onset kind of insomnia.
The NHS calls it short-term insomnia if it lasts less than three months, and says to see a GP if changing your sleep habits has not helped or you have had trouble sleeping for months. Everything below is what to change first.
What stops you falling asleep?
Four things stop most people falling asleep: a warm room, stimulants still in the system, a mind that will not stop, and a bed that is uncomfortable enough to keep you shifting. Fix them in that order.
Caffeine lasts longer than people think. A 2013 study in the Journal of Clinical Sleep Medicine found that 400 mg of caffeine taken six hours before bed still cut sleep by more than an hour, which is why the NHS says no tea, coffee, alcohol or nicotine in the six hours before bed. Alcohol gets you off to sleep faster but fragments the second half of the night.
Light and heat matter too. Your core temperature has to fall for sleep to start, so a bedroom above 20°C works against you; the Sleep Foundation puts the ideal at around 18°C. Bright screens in the last hour delay melatonin, and a room that is not fully dark keeps the brain half alert.
How do you fall asleep in two minutes?
The fastest technique most people can learn is the military method, a relaxation sequence taught to US Navy pilots and described in the 1981 book Relax and Win by Bud Winter. It takes about two minutes once practised, though it usually needs a few weeks of nightly use before it works reliably.
Lie on your back and relax your face, starting with the muscles around the eyes, then the jaw and tongue. Drop your shoulders as low as they will go, then relax one arm at a time from the top down. Breathe out and let your chest go loose, then relax your thighs, calves and feet in turn.
With the body relaxed, spend ten seconds clearing your mind. Picture lying in a canoe on a still lake under a clear sky, or in a black velvet hammock in a dark room. If thoughts intrude, repeat "don't think" to yourself for ten seconds and return to the picture.
Which breathing and mind techniques work?
Three techniques have the best track record for a racing mind: 4-7-8 breathing, paradoxical intention, and writing the worry down. Pick one and use it every night for a fortnight rather than switching between them.
For 4-7-8 breathing, breathe in through the nose for a count of four, hold for seven, and breathe out slowly through the mouth for eight; four rounds is enough. Paradoxical intention turns the problem around: keep your eyes open and gently try to stay awake, which removes the pressure to sleep that keeps many people alert. It sounds odd and works surprisingly often.
If the mind is running through tomorrow, keep a notepad by the bed and write the list down, then add three things that went well today. A 2015 trial in JAMA Internal Medicine found that a six-week mindfulness course improved sleep quality in older adults with sleep problems more than sleep-hygiene education alone, so a short body-scan meditation is worth trying if the notepad is not enough.
What should your wind-down routine look like?
Work backwards from your alarm: count back seven to nine hours for bedtime, then treat the hour before it as a wind-down with the same steps every night. Consistency is what trains the body to expect sleep.
Eat your last proper meal three hours before bed; a banana or a slice of wholegrain toast is fine later if you are hungry. Finish exercise at least four hours before bed, as the NHS advises. A warm shower an hour before bed helps, because the temperature drop as you cool afterwards is a strong sleep signal.
Then dim the lights, put the phone somewhere you cannot reach it, and read something on paper. Turn the clock to face the wall: checking the time is the fastest way to start calculating how little sleep you will get.
Does your bed stop you falling asleep?
Yes, if it is too warm, too hard at the shoulders and hips, or moves every time your partner does. A body that keeps shifting to get comfortable never reaches the stillness sleep needs.
The pillow is the quickest fix, because heat builds up around the head and neck first. The REM-Fit 500 Cool Gel Pillow, a Good Housekeeping Winner 2026, puts a cooling gel layer over memory foam so your head stays cool while your neck stays supported.
REM-Fit 500 Cool Gel Pillow
Good Housekeeping Winner 2026: a cooling gel layer over supportive memory foam, so your head cools down as fast as the rest of you.
Shop the 500 Cool Gel Pillow✓ 100-night trial✓ Free UK delivery✓ 0% finance
If the mattress is the problem, the signs are waking hot, a dip you roll into, or feeling every turn your partner makes. Every REM-Fit hybrid pairs open-cell memory foam, which lets air pass through the foam rather than trapping heat, with tall pocket springs that move independently, and you can compare the full hybrid range by tension.
The medium 3000 Supreme suits side sleepers and the firm 4000 Ortho Elite suits back and front sleepers and back pain; our firmness guide helps you choose. Our guide to sleeping cool covers the bedroom itself.
What if you are still awake after 20 minutes?
Get up. Lying in bed awake teaches the brain that bed is a place for being awake, so after about 20 minutes go to another room, keep the lights low, and do something dull until you feel sleepy, then go back. The NHS advice is to go to bed only when you are sleepy, and to skip daytime naps so the pressure to sleep builds by evening.
If you wake in the night rather than struggling at the start, that is a different problem with different fixes, and our guide on how to stay asleep all night covers it.
How to fall asleep fast FAQs
Last updated: August 2026
How can I fall asleep in 5 minutes?
Most people cannot on demand, and falling asleep in under five minutes every night usually means you are short of sleep. The military method gets many people there in about two minutes after a few weeks of practice, provided the room is cool and dark and there is no caffeine in your system.
What is the military method for falling asleep?
A relaxation sequence from the 1981 book Relax and Win: relax the face, drop the shoulders, relax each arm, breathe out and loosen the chest, relax the legs, then clear the mind for ten seconds by picturing a still lake or a dark hammock. Repeat "don't think" if thoughts intrude.
Does 4-7-8 breathing help you fall asleep?
Yes for many people, because the long exhale slows the heart rate and takes attention off thoughts. Breathe in for four, hold for seven, out for eight, and repeat four times.
How late is too late for caffeine?
Six hours before bed is the NHS cut-off for tea, coffee and alcohol, and a 2013 study found caffeine taken six hours before bed still cut sleep by over an hour. If you go to bed at 11 pm, make your last coffee before 5 pm, and remember chocolate and some painkillers contain caffeine too.
Should I get up if I cannot sleep?
Yes, after about 20 minutes. Go to another room, keep lights dim, do something quiet and go back to bed only when sleepy. It stops your brain linking the bed with lying awake.
Sources: NHS, Insomnia; Drake et al., Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed, Journal of Clinical Sleep Medicine, 2013; Black et al., Mindfulness meditation and improvement in sleep quality, JAMA Internal Medicine, 2015; Sleep Foundation, Best Temperature for Sleep.
