Most adults know that chronic (0) TIREDNESS (TIRE) is bad for their health, yet sleep remains one of the most commonly neglected aspects of modern life. Sleep 1DEPRIVE has been shown to affect almost every measurable aspect of performance, including 2CONCENTRATE, reaction time and decision-making. The brain also uses the hours of sleep to process and 3MEMORY information learned during the day, which is why students are consistently advised to revise for examinations before a full night's rest rather than in the small hours. A regular sleep pattern is a fundamental part of any 4HEAL lifestyle, yet the rise of screens and shift work means that many people go for months without one. Adequate sleep also helps the body regulate hormones responsible for appetite and mood. Those who sleep well tend to be more 5ATTEND at work, less 6ANXIETY in their personal lives and better able to cope with 7STRESS situations when they arise. For all these reasons, doctors increasingly regard good sleep hygiene as one of the most 8BENEFIT investments a person can make in long-term wellbeing.