Richard Nixon's Commandments of Statecraft

1) Always be prepared to negotiate, but never negotiate without being prepared.

2) Never be belligerent, but always be firm.

3) Always remember that covenants should be openly agreed to but privately negotiated.

"Public tactics tend to harden the opposition. 
Successful diplomatic or business negotiators resist the temptation to grandstand or make public demands that can be interpreted as threats."

4) Never seek publicity that would destroy the ability to get results.

5) Never give up unilaterally what could be used as a bargaining chip. Make your adversaries give something for everything they get.

6) Never let your adversary underestimate what you would do in response to a challenge. Never tell Him what you would not do.

7) Always leave your adversary a face-saving line of retreat.

8) Always carefully distinguish between friends who provide some human rights and enemies who deny all human rights.

9) Always do at least a much for our friends as our adversaries do for our enemies.

10) Never lose faith.  In just cause faith can move mountains. Faith without strength is futile; but strength without faith is sterile.

11) "Sometimes leaders are hesitant about executing strong and controversial measures in the belief that a less than full-hearted operation mutes criticism. When you once decide, go with all your might."

12) "When saying 'always' and 'never,' always keep a mental reservation; never foreclose the unique exception; always leave room for maneuver. A president always has yet to be prepared for what he thought he would never do."