As we know, the most reason that our humam beings are considered at the top of all creatures is we have the amazing brain. Our brain can think, reason and remeber things. So as for me, I put memory at a very high status that I always think about things which I have had experienced. Each time I reminisced the past, my high school period would came in my mind.
The first reason I treasure that period most is that I work hard at that 3-years. In my concern, I really agreed that people do remember the hard time they have ever undergone. This saying fits me appropriately. I remembered in my high school I went to school at 6 o'clock. In the winter,  at that time, sun has not risen yet. After a whole day study at school, I back home at almost 22 o'clock- the sky is obviously already dark. Even after school, there still many homework left, I should finished them till late night.
The reason I remembered it most not because I only studied hard, but at that time I also had a very clear target, college entrance exam. A clear aim would let you have a bright move and feel full of energy.
The last one is that this exam influenced me a lot, which I did not get a good result. As I mentioned above that people always remembered things that they did not feel good, may be they failed in it. This is a very important exam for every Chinese student, we spent almost a year to prepare it. But though I worked hard, it is not enough. When I entered the college, I did not realized this bad result would influenced me so much. As a freshman in college, I feel relax and no more exams to take each year. But till now, after day by day study, the effects emerged. It gives me some side effects that I need to work harder to get through.
May be any word would not play a role, but if I back to my high school period, I would imposed myself to read more books that would let me know what study means. But now, what we should do is focus on today, to let the future in your control.