1. Use polite words between Muslim and even non-Muslim. Allah encourage Muslim to be gentle and justice to non-Muslim. He wouldn't be mercy upon those who are having no mercy to the human being.
2. Forgive those who treat us crucially, because by Allah, those eight are forgiving will get great reward from Allah.
3. Avoid to talk about something ridicule because our prophet said if you believe in Allah the day of judgment u should either talk something good or keep silent.
4. Giving Salam when meeting one another, our prophet always the first giving salam to people when he met each other.