Leave the President's family business to him. You will have plenty to do without trying to manage the First Family. They are likely to do fine without your help.
Don't necessarily avoid sharp edges. Occasionally they are necessary to leadership.
Let your family, staff, and friends know that you're still the same person, despite all the publicity and notoriety that accompanies your position.
Don't do or say things you would not like to see on the front page of The Washington Post.
Arguments of convenience lack integrity and inevitably trip you up.
Be able to resign. It will improve your value to the President and do wonders for your performance.
Be precise. A lack of precision is dangerous when the margin of error is small.
Be yourself. Follow your instincts. Success depends, at least in part, on the ability to "carry it off."
Congress, the press, and the bureaucracy too often focus on how much money or effort is spent, rather than whether the money or effort actually achieves the announced goal.
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.
Don't be a bottleneck. If a matter is not a decision for the President or you, delegate it. Force responsibility down and out. Find problem areas, add structure and delegate. The pressure is to do the reverse. Resist it.
Don't say "the White House wants." Buildings can't want.
Don't think of yourself as indispensable or infallible. As Charles De Gaulle said, the cemeteries of the world are full of indispensable men.
Enjoy your time in public service. It may well be one of the most interesting and challenging times of your life.
First rule of politics: you can't win unless you're on the ballot. Second rule: If you run, you may lose. And, if you tie, you do not win.