If improving sleep hygiene and other lifestyle changes alone don’t help you sleep, the next step is cognitive behavioral therapy to improve sleep and reverse chronic sleep disorders. Experts estimate that between 1 in 10 and 1 in 3 people have some degree of sleep disorders, meaning they have trouble falling asleep in the morning, staying asleep, or waking up earlier than intended (or a combination of the above). Changes in your sleep pattern can also lead to sleep disorders — for example due to shift work or changing time zones after a long-haul flight (jet lag). Both are thought to have effects on the brain that make it easier for you to fall asleep.