Routine is usually seen as a negative term nowadays,of nine-to-fivers. We live in what is fast becoming a 24-hour society,where everything is open all hours. You can buy your groceries at midnight, book your holiday on the internet at 3 am,and do business online at the crack of dawn. Before you join the 24-hour revolution,however, take a minute to listen to what your body is trying to tell you - that a round-the-clock lifestyle is not what nature intended.