Some people do not have any of these problems. But they still cannot sleep. Doctors sometimes give drugs to help these kind of sufferers. These can help people to get through difficult times. But they are not usually a permanent answer. If possible, it is best to discover the cause of the problem and to solve it.
Here are some suggestions that can help people to sleep.
Do something quiet and restful before going to bed.
Try not to do anything at the end of the day that involves a lot of thinking.
And try not to argue with anyone!
Try and be as calm as possible before lying down to sleep. When you lie down, let every part of your body rest completely on the bed.