Do no harm.
Refrain from actions, words or opinions that rub others the wrong way. All beings everywhere experience fear and states of suffering and loss, don't put salt on an open wound.
Cultivate a wealth of virtue.
Actively practice generosity, love and kindness. Rejoice in others happiness. Earnestly strive to develop discipline, patience and relentless perseverance.
Tame this mind of ours.
Abandon grasping and fixation, these lie at the root of all our problems. Do not lend yourself to compulsive activity and distraction. Pour your efforts into gaining insight into the nature of your own mind and the nature of reality- that is the path to liberation.