10% of conflict is due to difference in opinions and 90% is due to the wrong tone of voice.
You have to make sure that when you are speaking to people you speak to them how you would like to be spoken to yourself, do not speak to someone in a bad manner if you would not like to be spoken to the same way. Before you say anything you need to think about what you are saying befored you actually say it. Sometimes you may say something without thinking about it beforehand and offend someone. Speakl to people in a normal tone of voice, not to quiet but not to loud either.