Effectiveness is at the heart of everything we do. David Ogilvy himself wrote a series of full-page ads in the New York Times in the 1960s with headlines such as "How To Create Advertising That Sells." His most famous book, Ogilvy on Advertising, is packed with guidance on the success factors of effective campaigns. However, the marketing landscape has changed beyond recognition in the past fifty years. We are delighted to share our latest publication, The Ogilvy & Mather guide to effectiveness. In it, Worldwide Effectiveness Director, Tim Broadbent, deals with one of the most central questions in marketing: how to increase the effectiveness of our campaigns. As marketing budgets come under increasing pressure in response to economic uncertainty in Europe and elsewhere, effectiveness is rising higher on clients' agendas. The message is timely.