Article in English: "I" messages allow you to take responsibility for your own feelings and opinions in communication without attacking or offending others. These assertive statements are based on your own unique experience regarding a certain topic. They do not focus on the other person's experience. "I" messages convey to the listener "this is what the situation looks like to me". Examples of "I" statements include:  "I get scared and upset when yelling or curse words happen during arguments" rather than "Your yelling and cursing scares me. You need to stop it." "I am worried that my abilities are not being put to use in my current position" as opposed to "You all placed me in a position that is not conducive to my growth." Turning down projects or nights out with friends might not seem all that friendly, but occasionally saying "no" allows you to say "yes" to events and tasks that allow you to flourish. For the most part, you have the right to use your time as you see fit. Assertiveness means giving a head shake to situations that are not in your best interests. Saying "no" might be difficult at first, but, with practice, you will see that exercising this right helps you get ahead. Doing so gives you experience setting boundaries with others and asserting yourself, which are some of the most important skills for both personal and professional growth. Setting boundaries will help you to communicate your needs to other people and ensure that people know what you will and will not tolerate. Many people shy away from asserting themselves in social situations because they equate assertiveness with being judgmental. Assertiveness, by definition, involves standing up to yourself, but this is done by compromising, considering other's needs and being respectful. Judgments are not cast. . Assertive people are considered to be expert communicators. It follows that such masters at communication cannot allow their emotions to control them. They must be in control of their emotions since failing to effectively manage your own feelings can...

Summary in Vietnamese:
Tập dùng câu có chủ thể là “Tôi”. Tập thoải mái khi nói “không”. Hạn chế những lời phán xét. Kiểm soát các cảm xúc của bạn. Cắt bỏ những tuyên bố dè dặt. Quyết đoán trong ngôn ngữ cơ thể. Học cách chọn các chiến thuật.