In most cases, changing who you are means doing things differently. Often, it means learning a new skill. Once you get started, take every opportunity to practice these new skills or ways of doing things.  Incorporate changes into your daily communication. Strive to interact with others as the person you are trying to become. For example, imagine you are trying to become more assertive. You could start by taking note of situations in which you could have stated your opinion more firmly, or  didn’t stand up for your own needs. Then you may work on stating your needs in a way that is not aggressive or threatening. Skills will become easier and more comfortable with practice. It may be scary at first, but making changes will get you closer to who you want to be. Any major change or accomplishment requires ongoing and concerted effort. Work on becoming your new self every day.  A good way to create consistent progress is to set aside time in your daily routine for working on your goals. For example, you might set aside an hour every day for reading self-help books or attending assertiveness training. Keep in mind that to make big changes, you must invest a lot of time and effort. Working hard and consistently over a period of time is how you will become the person you wish to be. Remember that failure is a part of working towards a goal. It is common to take 1 step forward and 2 steps back sometimes when you are working towards a goal. If you make a mistake or do not meet a goal, try to look at it as a learning experience and move forward from there. For example, if you are working towards a weight loss goal, you may have a week here and there where you do not lose anything or you gain a couple of pounds. This is a normal part of that process. Use these weeks as opportunities to tweak your diet and exercise program for better results. People constantly change and evolve. What you like or want now may be different from what you wanted five years ago. It may also be different from what you will want 10 years from...

TL;DR in Vietnamese:
Rèn luyện kỹ năng và thói quen mới. Kiên định trong quá trình tiến đến mục tiêu. Duy trì động lực. Cởi mở trong việc thay đổi.