Routine is usually seen as a negative term nowadays,largely because we no longer belong to a society 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.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.