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.
Test ideas in the marketplace. You learn from hearing a range of perspectives. Consultation helps engender the support decisions need to be successfully implemented.
In our system leadership is by consent, not command. To lead a President must persuade. Personal contacts and experiences help shape his thinking. They can be critical to his persuasiveness and thus to his leadership.
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.
Your performance depends on your people. Select the best, train them and back them. When errors occur, give sharper guidance. If errors persist or if the fit feels wrong, help them move on. The country cannot afford amateur hour in the White House.
When you raise issues with the President, try to come away with both that decision and also a precedent. Pose issues so as to evoke broader policy guidance. This can help to answer a range of similar issues likely to arise later.
Then there are three or four countries that have said they won't do anything. I believe Libya, Cuba and Germany are ones that have indicated they won't help in any respect.