Executive Orders
Traditionally the first official act a new president does right after being sworn in is to sign an executive order. CNN has a good article, here, discussing the controversial decisions that Obama may change from the Bush administration. The video above is also a good discussion. If you want to see all executive orders since 1937, click here. Two of the more famous executive orders are Truman's one integrating the military and Clinton's "Don't ask don't tell."