When the friendly jailer gave Socrates the poison cup to drink, the jailer said: "Try to bear lightly what needs must be." Socrates did. He faced death with a calmness and resignation that touched the hem of divinity.
An hour of planning can save you 10 hours of doing.
If you must make a mistake, make a new one each time.
Act as if you were already happy and that will tend to make you happy.
Be sympathetic with the other person's ideas and desires.
Perhaps you will forget tomorrow the kind words you say today, but the recipient may cherish them over a lifetime.