I have found the best way to give advice to your children is to find out what the want and then advise them to do it.
 
If you cannot convince them, confuse them ("Harry S Truman Quotes - The Quotations Page").
 
Always be sincere, even if you don't mean it. 
 
I would rather have peace in the world than be president.
 
If you can't stand the heat, get out of the kitchen.
 
The reward of suffering is experience.
 
The White House is the finest prison.
 
When you have an efficient government, you have dictatorship.
 
You want a friend in Washington? Get a dog ("Harry S. Truman Quotes").
 
 Why, this fellow doesn't know any more about politics than a pig does about Sunday.

He became an expert at doing nothing.

The only thing new in this world is the history that you don't know ("Harry S. Truman Quote Page").