Why you can't sleep — and what actually helps
The common-sense approaches to insomnia that make it worse, the clinical reason they fail, and what the evidence actually shows works. A plain guide to CBT-I.
If you have had chronic insomnia for any length of time, you have almost certainly tried most of the standard advice. Go to bed earlier. Avoid screens before sleep. Cut out caffeine. Take a warm bath. Buy a better mattress. Try magnesium. Download a sleep tracking app.
Some of these things are reasonable. None of them, in my clinical experience, have resolved chronic insomnia for anyone who was genuinely stuck. And for most of my patients, several of them — the going to bed earlier in particular — have made things measurably worse.
Understanding why requires understanding something counterintuitive about how sleep works.
The mechanism that maintains insomnia
Sleep is driven by two biological systems working in concert: the circadian rhythm, which regulates the timing of sleep, and homeostatic sleep pressure — the gradual accumulation of sleepiness with every hour of wakefulness that is then discharged during sleep.
When you go to bed earlier to compensate for poor sleep, you reduce the sleep pressure that was available at your normal bedtime. You lie in bed with insufficient drive for sleep, your brain is alert rather than sleepy, and you spend two or three hours awake in the place that is supposed to be your signal for rest. Over weeks and months, the bedroom itself — through classical conditioning — becomes a cue for wakefulness. The body learns that bed means arousal, frustration, and hypervigilance about whether sleep is coming.
This is the mechanism that maintains chronic insomnia long after the original trigger has passed. The precipitant — a period of stress, an illness, a difficult life event — is gone. The perpetuating pattern that developed in response to it is still running, and it will continue running until it is directly addressed.
Why common sense makes it worse
Almost every instinctive response to insomnia makes things worse over time. Going to bed earlier spreads weak sleep across more time, reducing its quality and fragmenting its architecture. Napping reduces the sleep pressure available for the following night. Lying in bed trying to sleep is, neurologically, the equivalent of trying to force yourself to be hungry — the effort itself activates the arousal system that prevents the thing you are trying to produce.
The sleep tracking app deserves a particular mention. Monitoring sleep in granular detail increases the cognitive arousal and performance anxiety that are central to maintaining insomnia. The person who knows at 3:47am that they have achieved only 1.8 hours of deep sleep is not being helped by that information.
What the evidence says works
Cognitive Behavioural Therapy for Insomnia — CBT-I — is recommended by NICE as the first-line treatment for chronic insomnia. A 2015 meta-analysis reviewing twenty randomised controlled trials found significant and durable improvements in sleep onset, night wakings, and sleep efficiency. Crucially, unlike medication, the improvements were maintained at follow-up.
CBT-I does not treat sleep directly. It treats the habits and beliefs that are preventing sleep from happening. The core techniques — sleep restriction therapy, stimulus control, and cognitive restructuring of sleep-related beliefs — are specific, evidence-based, and the opposite of what most people are doing.
Sleep restriction asks you to temporarily reduce your time in bed, concentrating the sleep drive and rebuilding the architecture of consolidated sleep. It is counterintuitive and, in the first week, genuinely uncomfortable. It is also the most effective single technique in the insomnia literature.
Stimulus control rebuilds the conditioned association between bed and sleep — breaking the pattern where the bedroom has become a cue for wakefulness rather than rest.
Cognitive restructuring addresses the beliefs that generate the performance anxiety maintaining the whole cycle: the conviction that you must get eight hours or tomorrow will be ruined, that lost sleep must be recovered, that there is something fundamentally wrong with your ability to sleep.
Where to start
If you have had insomnia for more than three months, it is worth treating it systematically rather than continuing to try individual lifestyle adjustments. The Insomnia Blueprint applies the full CBT-I programme in a structured, self-guided format — the same eight-module approach used in individual therapy, adapted so you can work through it independently.
If you suspect an underlying medical condition — sleep apnoea in particular — see your GP before beginning any sleep programme. CBT-I is not appropriate for untreated sleep apnoea.