Sleep is very important for our health. When we sleep, our bodies and minds can rest and recover. Most adults need between seven and nine hours of sleep each night. However, many people do not get enough sleep. This can cause problems with concentration at school or work. It can also make us feel tired and irritable. Studies have shown that people who sleep well are often healthier and happier. Although it can be difficult to change your sleep habits, there are things you can do. Try to go to bed and wake up at the same time every day. Also, avoid using electronic devices before bed, because the light can keep you awake. Finally, make sure your bedroom is dark, quiet, and cool.