We do have a saying in America: if you're in a hole, stop digging ..... erm, I'm not sure I should have said that.

It isn't making mistakes that's critical; it's correcting them and getting on with the principal task.

You go to war with the army you have, not the army you might want or wish to have at a later time.

Let your family, staff, and friends know that you're still the same person, despite all the publicity and notoriety that accompanies your position.

There's another way to phrase that and that is that the absence of evidence is not the evidence of absence. It is basically saying the same thing in a different way. Simply because you do not have evidence that something does exist does not mean that you have evidence that it doesn't exist.

When asked for your views, by the press or others, remember that what they really want to know is the President's views.

Learn to say 'I don't know.' If used when appropriate, it will be often.