Here are the answers:
Strengthen the foundation and practice more questions.
Maintain a stable mindset and don't worry.
Do more than 5 Codeforces * 3500 questions a day, and do more competition questions from previous years.
Don't always learn difficult knowledge points.
Calm down and be like an old Buddha.
This article is translated by https://fanyi.baidu.com/.
listen to this before sleeping everyday
I'll translate the above text from bullshit to English, so that everyone can understand:
Stop reading this comment and grind.
Stop reading this comment and grind.
Stop reading this comment and grind.
Stop reading this comment and grind.
Stop reading this comment and grind.
Please attribute any discrepancies between the exact meanings to google, I used google translate to translate, since bullshit is not my first language.