Giữ điềm tĩnh. Nói chuyện duyên dáng. Tham gia một lớp diễn xuất. Hãy lịch thiệp. Tránh khoe khoang khoác lác. Hãy giữ sự cân bằng.

Given the above summary, write a detailed text in English for it.
People who are graceful aren’t often seen blowing up at people, saying things they regret, or hurling furniture through windows. They are composed and don’t let other people get to them and they know when to take a breather if they feel themselves getting angry. They aren’t seen ranting and raving or hurling insults at people, either. They tend to stay calm and to be a bastion of strength when others need them. That said, graceful people aren’t perfect. If you blow up at someone, you have to give a sincere apology. Graceful people tend to be articulate, to speak at the right volume, and to not speak too fast or too slow. They are clear and direct in their language, have a varied vocabulary, and make their thoughts clear. They also tend to avoid cursing or using too much slang. Though it’s okay to pause sometimes when you’re gathering your thoughts, graceful people don’t tend to stutter or say “uh” or “um” or “like” every other word. They have control over their words and they believe in what they say.  Part of speaking well means thinking before you speak. If you plan what you’re going to say before you say it, then you’ll be more likely not to have to backtrack and to be clear in your words. In order to speak well, you should also have a mastery of proper grammar. For example, you shouldn’t say “Him and me went to the movies” when it’s really “He and I went to the movies,” and so on. Graceful people are poised and confident, both verbally and non-verbally. Learn some good gestures and movements, and use them. You don’t have to be the next Jack Nicholson to take an acting class. You can just use it to learn how to carry yourself with more poise and grace. It can also help you build confidence and learn how to speak in front of an audience, which is something that people with grace naturally excel at.  You’ll also learn how to interact with a wider variety of people, which is also something that graceful people know how to do. If an acting class isn’t up your alley, you can try taking a dance class or a ballet...