What is the most useful thing what you have learned? The life is a constant process of learning. Don’t you believe? Every day humans learn new somethings. But if I had to choose one, I would choose the following. I was as a practice teacher at the school. The afternoon before, although I had to study, I decided to go out with my Friends. The next morning, my pupils had a mathematics exam. So, I ordered them to put their tables in a single line. While they were doing it, one of them came to my table. She was very smiling, a fact which produced my surprise because she always felt nervous before an exam, and told me: I have been studying this exam for a week. Yesterday, only I had to review it little time and could play with my brother. At that moment I remembered the decision which I had made yesterday. During the exam, I was thinking about my student had taught me. Do you know what was the first thing that I did when I came back home from school? Yes, I finished my task. In that situation, I learned to not leave the obligations for another time if I can do now, and be more organized with my timetable.