Cultural change and leaderschip in organizations. A practical guide to succesful organizational change

The need for change in organizations is not uncommon, theater as a result of financial crisis, collaboration issues following an international merger of other major events. But how can an organization effectively transform themselves? Transformation and strategic change is not possible without cultural change, but cultural change is not a simple process. So, which steps can leaders take in order to tackle cultural changes successfully and what are meaningful change strategies?