Andrew Weil, a Harvard professor, provides the solution for those who have trouble getting to sleep at bedtime at night. If, when you put to bed you feel stressed, anxious, thoughtful or simply that you are unable to sleep for some reason you do not know, so this technique to fall asleep may please you.
The doctor specializes in technical freeing the body from anxiety and tension. This book and his breathing trick called the "4-7-8" and is deemed effective in cases of sleep disorders and mild insomnia. The system is based on the concentration of your breathing. He explains that with a bit of exercise, it is easy to calm down and fall asleep in a chrono minute.