While looking up ITIL definitions, I stumbled upon this great article by Anthony Orr and Erin Casteel. Their article begins:
"Following a basic maintenance plan is the best way to keep an automobile running efficiently and at peak performance, in both good and poor driving conditions. Getting regular oil changes and tune-ups, checking the water level, keeping the tires properly inflated, and other such tasks not only will keep your car running smoothly, but also will lesson the chance of a breakdown on a long journey. Similarly, following the best practices outlined in the IT Infrastructure Library, better known as simply ITIL, will help your IT organization run at peak performance and efficiency on its journey through the current economic landscape."
For the full article, see ITSMWatch.com Article