Everybody has a broken night"s sleep once in a while, but one in three adults suffer from prolonged insomnia at some stage in their lives. Sleeping pills may be recommended during a short-term crisis but according to the Buteyko method, sleep problems are caused primarily by the all-too-common phenomenon of over-breathing. A simple course of exercises, which anyone can learn in a week, could teach sufferers to control their breathing and bring sound sleep to the most chronic of insomniacs.