People continue to underestimate the importance of sleep, according to a leading expert. In a focus piece for WebMD, Professor Michael Breus explained that the responsibility for good sleep is not just one that healthcare professionals need to watch closely, but everyone who wants to look after their health. The first step when improving the quality of sleep, he explains, is to pay attention to symptoms such as snoring, daytime fatigue, irritability and lack of focus. "These are all signs of sleep deficiencies that are often brushed aside," Professor Breus claimed. People worried about their health should talk to a doctor. "This one is a no-brainer," he continued, stating that "we all must be our own first advocate for our health". From here, people need to establish a sleep routine. The expert asserted that sleep is one of the most critical factors in both mental and physical health, alongside a healthy diet and exercise. A sleep schedule should help people to attain between six and eight hours of rest each night.