First of all, you should find a sport you like, put your online energy into sports, and spend all your original online time on sports. This is very important, because you can't quit Internet addiction just by ideological struggle. After you start exercising, your energy will gradually shift from the internet to sports, and you will not be so dependent on the internet, so you will have a chance to quit. (This is the most important thing)

Then it is very important to keep a diary of your mood at an appropriate time and make some reflections and demands on yourself. What I think in my heart is completely different from what I write on paper. The right time is when you feel that you can't control yourself, or when you feel that you are making progress. This diary can write two or even a few lines of poetry, or something from the heart.

In addition, you'd better kill yourself with the characters in your online games, or delete all the games in your computer to show your determination. No matter how many passes, it is difficult, but compared with the short-term pleasure, I don't need to say more about who is lighter or heavier. When you get to college, you can play as much as you want (of course, it is best to control it). Why do you care about this now?

If you can attend the evening self-study, you must attend. Do not hesitate. In fact, self-study at night is not painful at all. You will devote yourself to doing your homework, which has advantages and disadvantages.

I am a sophomore now. I'm just a person who can use the computer whenever he wants to leave. I will never let the computer control my brain.