Sleep well to stay healthy.

Most working blokes know that the more they work, the less they sleep. What they may not know is that the more time they spend in their cars, the less they sleep. Drive time - not television viewing, computer addiction or exercise - is second only to hours on the job as a reason people don't get the shut-eye they need.

"The most deadly combination," says David F. Dinges, chief of the division of sleep and chronobiology at the University of Pennsylvania School of Medicine, "would be long commute time, long work hours and living in a place where you have to drive to get anything."