Never both be angry at the same time.

Never bring up mistakes of the past.

Never yell at each other unless the house is on fire.

If one of you has to win an argument, let it be mate.

If you have to criticize, do it lovingly.

Neglect the whole world rather than each other.

Never go to sleep with an argument unsettled.

At least once a day, compliment your partner.

Learn to accept your mistake whenever you do anything wrong.