Sleep Hygiene Deep Dive: How to Actually Sleep Better

This article is general information published by the practice of Dr. Sholeh Toobaei, Specialist Psychiatrist, Dubai. It has not yet been individually reviewed by a clinician and is not a substitute for personal medical advice. Published: 1 September 2026.

Scope: This article provides general sleep hygiene guidance. It is not a treatment plan. If you have chronic insomnia or a suspected sleep disorder, a professional assessment can help.

Why sleep is hard in modern life

Human beings were not designed for modern life. Our sleep systems evolved in environments with natural light-dark cycles, physical labour during the day, cool temperatures at night, and no artificial light or stimulating technology before bed. Modern life — air-conditioned rooms that are either too warm or too cold, blue light from screens until 1am, sedentary work with little physical exertion, caffeine available everywhere, irregular schedules — works directly against the biological mechanisms that regulate sleep.

Understanding this is important because many people with sleep problems believe there is something wrong with them. In most cases, there is not. Their sleep systems are working exactly as designed; they are operating in an environment that those systems were not designed for. The solution is not "try harder to sleep." It is changing the environment and the behaviours that interfere with sleep.

The biology of sleep: two key systems

Sleep is regulated by two interacting biological systems:

Circadian rhythm. Your body's internal clock — located in the brain's suprachiasmatic nucleus — follows approximately a 24-hour cycle. It is synchronised (entrained) primarily by light. Morning light tells your brain "it is daytime" and starts a countdown to sleep roughly 14–16 hours later. Evening light — especially blue light from screens — tells your brain "it is still daytime" and delays that countdown. This is why being on your phone before bed makes it harder to fall asleep: you are biologically telling your brain it is not yet night.

Sleep pressure (adenosine buildup). Throughout the day, a chemical called adenosine builds up in your brain as a byproduct of normal metabolism. The more adenosine, the stronger your sleep drive. Caffeine works by blocking adenosine receptors — not by removing adenosine, but by preventing it from making you feel sleepy. This is why caffeine late in the day is so disruptive: the adenosine is still building up, but you cannot feel it. When the caffeine wears off (it has a half-life of about 5–6 hours), all that built-up adenosine hits at once, which is one reason people wake up in the middle of the night after afternoon coffee.

Sleep hygiene works primarily by optimising these two systems: strengthening your circadian rhythm and allowing sleep pressure to build naturally.

Light: the single most important factor

Morning light. Get 10–30 minutes of natural light within the first hour of waking. Not through a window (glass blocks much of the relevant spectrum). Outside, ideally. If you cannot get outside, a bright light box (10,000 lux) for 20–30 minutes is a reasonable alternative. This is the single most powerful anchor for your circadian rhythm.

Evening light. Dim the lights in your home in the two hours before bed. Use lamps instead of overhead lighting. Avoid bright screens. If you must use a screen, use blue-light-filtering glasses or software (f.lux, Night Shift) — though these are a partial solution at best. The most effective approach is to stop screen use two hours before bed and replace it with a lower-stimulation activity (reading a physical book, light conversation, gentle stretching).

This is particularly relevant in Dubai, where summers make evening outdoor light difficult and most of life takes place in brightly lit, air-conditioned indoor environments. The contrast between intensely lit offices and dimly lit bedrooms is extreme, and your circadian system needs a gradual transition between the two.

Temperature: cool is better

Your body temperature naturally drops by about 1–2 degrees Fahrenheit during sleep. A cool bedroom facilitates this temperature drop and makes it easier to fall and stay asleep. The ideal sleeping temperature is around 65°F (18°C) — which is why Dubai's standard air conditioning (often set much warmer) can interfere with sleep for people who are sensitive to temperature.

Practical tips: keep the bedroom cool, use breathable bedding (cotton or linen rather than synthetic materials), take a warm shower or bath 1–2 hours before bed (the subsequent drop in body temperature after you exit the shower mimics the natural sleep-related temperature drop), and avoid heavy blankets that trap heat.

Caffeine and timing

Caffeine has a half-life of 5–6 hours. This means if you have a coffee at 4pm, half of that caffeine is still in your system at 10pm, and a quarter is still there at 4am. For most adults, no caffeine after 2pm is a reasonable rule of thumb — but if you are particularly sensitive to caffeine or have insomnia, you may need to eliminate it entirely or switch to decaffeinated options in the afternoon.

One coffee a day is not inherently problematic for most people. Two or three, particularly after midday, are where caffeine becomes a significant sleep disruptor. In Dubai, where specialty coffee culture is strong and coffee consumption is socially central, this is an under-recognised factor in sleep problems.

Alcohol: the sleep saboteur

Alcohol may help you fall asleep, but it significantly worsens sleep quality. It fragments sleep (more awakenings in the second half of the night), suppresses REM sleep (the restorative dream sleep), and worsens snoring and sleep apnoea. The combination of alcohol helping you fall asleep but fragmenting your sleep is particularly insidious because you feel like you slept fine (you got to sleep quickly) while actually getting poor-quality rest.

If you drink alcohol in the evening, allow at least three hours between your last drink and bedtime. If you have persistent sleep problems, eliminating evening alcohol entirely for two weeks is a useful experiment — many people discover that their sleep problems were significantly driven by alcohol even when they did not drink enough to feel intoxicated.

Exercise and timing

Regular exercise improves sleep quality across all dimensions — faster sleep onset, more deep sleep, fewer nighttime awakenings. This is one of the most robust findings in sleep research. The mechanism is both physiological (exercise increases sleep pressure by increasing adenosine buildup) and psychological (exercise reduces anxiety and rumination, which are common barriers to sleep).

Timing matters. Vigorous exercise within two hours of bedtime can be stimulating and interfere with sleep for some people. For most, moderate exercise earlier in the day or late afternoon is optimal. But the most important factor is consistency — regular exercise, even if it is not perfectly timed, is far more beneficial than occasional intense workouts with perfect timing.

The bed-sleep association

Your bed should be for two things: sleep and sex. Anything else — working, watching TV, scrolling on your phone, worrying — weakens the association between your bed and sleep. Your brain should learn that lying in bed = sleep, the way it has learned that walking through a specific front door = home.

If you cannot fall asleep within 20–30 minutes, get out of bed. Go to another room with dim light. Do something boring (read a physical book, listen to calm music). Do not return to bed until you feel sleepy — not just tired, but sleepy. This is called stimulus control, and it is one of the most effective behaviour changes for insomnia. The key insight: lying in bed awake, worrying about not sleeping, teaches your brain that bed = awake + anxiety. You need to re-teach it that bed = sleep.

What not to do in bed

Trying to sleep. Sleep is not something you can do directly. It is something that happens when the conditions are right. The more you try to sleep, the more anxious you become about not sleeping, and the more awake you feel. The instruction is counterintuitive but critical: stop trying to sleep. Focus instead on relaxing — lying quietly, breathing slowly, letting go of tension. Sleep will come when it is ready.

Checking the clock. Every time you check the time and calculate "if I fall asleep now, I will get four hours," you are activating anxiety. Turn your clock away from your bed. Do not check your phone. The exact number of hours you will sleep is not useful information in the middle of the night.

Problem-solving at night. Your brain at 2am is not your best problem-solving brain. Nighttime thoughts tend to be distorted, catastrophic, and unproductive. If you are struggling with a problem at night, the most productive thing you can do is write it down (so you do not have to hold it in your head) and tell yourself you will think about it tomorrow during daylight hours, when your brain is actually capable of good problem-solving.

Weekend schedules and social jetlag

Many people who struggle with weekday sleep maintain a very different schedule on weekends — sleeping in late, going to bed late, irregular wake times. This creates "social jetlag" — your body's circadian rhythm is confused because it does not know what time it is. The Monday morning crash is partly biological: your body is literally experiencing jetlag every Monday because your weekend schedule shifted your internal clock.

For better sleep: keep your wake time consistent within 30–60 minutes across all days of the week. This is one of the most important — and most difficult — sleep hygiene rules. Sleeping in on weekends feels restorative in the moment but fragments your circadian rhythm and makes Monday night harder.

When sleep hygiene is not enough

If you have been practising good sleep hygiene consistently for four to six weeks and still cannot sleep, you may have chronic insomnia, which is maintained by different mechanisms than it was started by. Chronic insomnia often begins with a stressor (work, relationship, health) but becomes self-sustaining through conditioned arousal — your brain has learned that bedtime = anxiety.

The gold-standard treatment for chronic insomnia is CBT-I (cognitive behavioural therapy for insomnia), which goes beyond sleep hygiene to include sleep restriction (temporarily limiting time in bed to increase sleep efficiency), stimulus control (the bed-sleep association work described above), cognitive restructuring (addressing the beliefs about sleep that create anxiety), and relaxation training. CBT-I is more effective than sleep medication for chronic insomnia and the benefits last after treatment ends.

When should I seek help?

If you have difficulty falling or staying asleep most nights for more than a month; if you are dependent on medication or alcohol to sleep; if you snore loudly and wake up gasping (possible sleep apnoea); if you experience excessive daytime sleepiness despite adequate time in bed; or if your sleep problems are affecting your work, relationships, or safety (driving while sleepy is as dangerous as driving drunk) — seek a professional assessment. Sleep problems are highly treatable, and the right treatment depends on identifying the underlying cause.

Seek urgent help — call 999 (police) or 998 (ambulance) in the UAE, or go to the nearest emergency department — if you are having thoughts of self-harm, if you are in severe emotional distress, or if you are in any way a danger to yourself. For non-urgent enquiries, use the appointment request form on this website. This practice does not operate a monitored telephone line, and a message sent through the form may not be read straight away.