Visit with your predecessors from previous administrations. They know the ropes and can help you see around some corners. Try to make original mistakes, rather than needlessly repeating theirs.
It is easier to get into something than to get out of it.
Don't divide the world into “them” and “us.” Avoid infatuation with or resentment of the press, the Congress, rivals, or opponents. Accept them as facts. They have their jobs and you have yours.
* A president needs multiple sources of information. Avoid excessively restricting the flow of paper, people, or ideas to the president, though you must watch his time. If you overcontrol, it will be your “regulator” that controls, not his. Only by opening the spigot fairly wide, risking that some of his time may be wasted, can his “regulator” take control.
Establish good relations between the departments of Defense and State, the National Security Council, CIA and the Office of Management and Budget.