Be tactful – Avoid being blunt. Say "I'm sorry" if you intentionally or unintentionally hurt someone. Sometimes we are rude or grumpy when we are tired, rushed or having a bad day, and then when we realize we have made a mistake, we are too embarrassed to apologize and we just continue on as though nothing has happened. Don't do that. Take a moment to own up and make verbal amends. Don’t mock or belittle colleagues, nor tell offensive jokes that sting.