Success in today's competitive and complex world depends upon the ability to bring about effective strategic change. Much of the business literature has been preoccupied with finding more sophisticated techniques to formulate better strategies. But business success depends not only on finding the right strategy, but also ensuring it materializes in the form of a pattern of appropriate strategic actions. We know relatively little about this part of the strategy-making process. This article shows how a better understanding of the use of power can provide the energy to ensure strategic action by driving the organization and its members through the strategy-making process.