Law #20

Do not commit to anyone.

It is the fool who always rushes to take sides. Do not commit to any side or cause but yourself. By maintaining your independence, you become the master of others - playing people against one another, making them pursue you.

Law 19 - Know who you're dealing with.

Law 18 - Do not build fortresses.

Law 17 - Unpredictability

Law 16 - Create value through scarcity.

Law 15 - Crush your enemy totally.

Law 14 - Pose as a friend, work as a spy.

Law 13 - When asking for help, appeal to people's self-interest.

Law 12 - Selective honesty.

Law 11 - Keep people dependent on you.

Law 10 - Avoid people who bring you down. (This link also has links to laws 1-9)

Don't forget to check out IllimitableMan's blog too, regarding power.