First, read the English article below.

Tell yourself that you are positive, good at what you do and ready to make changes when needed. Repeat often for maximum effect. Some affirmations you can start with include: "I'm a good person and I deserve to be loved and respected," "I am more than my insecurities," "I am doing the best that I can, and that is all I can do." The moment you let someone judge who you are, is the moment you have lost your happiness to someone else. Don't let other people tell you who you are. This is your life, not theirs. And while it is hard to stand up for what you believe in and to be your whole self, doing so is part of what defines your very best self. Surround yourself with people that make you happy. Being around negative people only drags you down. This may sound like a cliché, but think about how you feel when you're around positive people and how you feel when around negative people. It's two opposite extremes and you know how you'd rather be feeling. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Tập luyện khẳng định mình trước gương. Xóa khỏi đầu óc sự chỉ trích vô tâm hoặc mang tính phán xét của những người khác.