My Hay Group colleagues, Scott Spreier and John Larrere, culled this advice for a Business Week article from their experience studying and working with leaders around the world: he should immediately start taking the following six steps, so that by the end of his first 100 days in office he has established his credibility as a global leader and has begun moving the country forward:

  1. Assume a dual leadership role of figurehead and visionary.
  2. Create a solid, sustained narrative to “sell” his vision and drive it forward.
  3. Quickly grasp the scope, complexity, and diversity of his constituencies.
  4. Maintain a healthy sense of curiosity and an openness for new ideas.
  5. Create an effective leadership team that can help drive his vision.
  6. Create a unique “Presidential” self-image.

Read more here.