7 ways to sleep better, and one that just costs you money

More than four million people have been tracked in research on sleep and health. The finding is consistent: if you routinely get fewer than seven hours a night, your risk of illness, memory problems and a shorter life goes up. Everything about Sleep starts with the question of how much you actually need: for most adults, that is seven to eight hours a night. The following seven steps show you how to get there.

A regular sleep schedule protects far more than just your nights

If your sleep times vary a lot, you face a higher risk of depression, anxiety disorders, weight gain and premature death. That effect is independent of how many total hours you clock up. A consistent sleep schedule is therefore not your grandmother's advice but one of the best-supported things you can do. Go to bed and wake up at the same time every day, weekends included.

Exercise regularly, cut the caffeine and skip the evening drink

Regular physical activity demonstrably improves your sleep. Caffeine and alcohol in the evening disrupt sleep quality, even if you have no trouble dropping off. Alcohol creates a false sense of falling asleep faster, but it breaks up your deep sleep stages. Together, these three measures form the foundation that appears in virtually every sleep guideline with a serious evidence base. Find out more about what genuinely helps with sleep problems, including the proven self-help steps.

Sleep sharpens your memory, and even one short night blunts it

While you sleep, your brain processes and consolidates new information. If you consistently get fewer than seven hours, you demonstrably learn new things less effectively. The evidence for this is robust and draws on dozens of studies. In practical terms, it means: learn something new, then sleep on it, literally.

A cool, well-ventilated bedroom makes a measurable difference

A temperature between 20 and 25 degrees Celsius and fresh air both improve sleep depth and sleep efficiency. Above 25 degrees, quality drops quickly. For older adults, the comfortable temperature window is narrowest and the impact of heat is greatest. Ventilation is not a minor detail either: high CO2 levels in a poorly ventilated room disrupt your sleep. Cool and fresh is the simplest bedroom adjustment with solid evidence behind it.

Loneliness disrupts your sleep through a biological mechanism

People who are lonely have a 75% higher chance of poor sleep and take an average of nine minutes longer to fall asleep. Part of this comes from feelings of depression, and part from a biological hypervigilance response that your brain triggers when it senses an unsafe environment. Working on social connection is therefore not just psychological advice but a concrete step toward better nights. Read more about the link between loneliness and sleep.

Melatonin works, but the dose and timing are everything

For adults who struggle to fall asleep, 4 mg produces the strongest effect, provided you take it two to three hours before bed rather than right before you lie down. If you are over 55, extended-release melatonin (2 mg) is the only form that is officially recommended. The long-term safety of higher doses has not yet been studied thoroughly enough. Melatonin is not a sleeping pill but a signalling molecule that resets your body clock.

CBT-I delivers lasting improvement; sleep medication does not

Cognitive behavioural therapy for insomnia (CBT-I) is the most powerful approach for persistent sleep problems. It is the only treatment proven to maintain its benefits after the therapy ends. Sleep medication produces comparable short-term results but lacks that lasting effect. If you combine medication with CBT-I, the evidence suggests it actually reduces the therapy's long-term success. A digital CBT-I app also helps, though working with a therapist produces the best outcomes. The same applies when pain is involved: CBT-I reliably improves sleep in people with chronic pain, even when the pain itself does not go away.

Weighted blankets: some evidence, but skip it if you have nothing to complain about

Weighted blankets score well in marketing materials. The research shows a modest positive effect in adults with sleep problems or anxiety, strongest in people with psychiatric conditions. But the studies are small and methodologically limited. In children, the evidence is insufficient. A weighted blanket can easily set you back a hundred euros or more. If you do not have serious anxiety complaints, that money is better spent on a thermostat or blackout curtains, both of which have a more solidly supported evidence base.