1. Always cross-check materials created by others.

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• It doesn't matter what it is, as long as it's created by someone other than you. Whether it's an analyst report, data from a government agency or research institute, or even an analysis of other investors that you saw on the internet, whatever it may be, you should not take other people's materials as they are. You should review them one by one and reconsider them.Through this, 1) you can catch mistakes that they can make as humans, and 2) you can review how they came up with their investment ideas. This process can be seen as a kind of benchmarking. The best way to become a fast follower is to benchmark the industry leader, and as you repeat this process, you will gain experience and eventually become a first mover who can suggest ideas to others instead of following theirs.

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2. When looking for data, look at the most original data (raw data) as much as possible.

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• Many people are particularly bothered by point number 2. Many data appear in the process of unraveling the logic, whether it's a press article, an analyst's or another investor's report. Most investors just look at the existing content and accept it. Instead, it's a good idea to develop the habit of looking for and reviewing the most original data where the data is mentioned, i.e. raw data. Of course, in some cases it may be impossible because it is paid, but if it is not, it is helpful for your learning to look into it as much as possible. It may seem time consuming and inefficient to find and organize raw data one by one, but it is definitely not a wasted time. It is a time that will become your blood and flesh.Through this process, 1) you can re-organize your own thoughts, 2) you can rediscover data that others don't pay attention to, and 3) most importantly, people remember and understand things much better when they put in effort to organize it themselves, rather than being fed by others.

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3. Quantify and measure as much as possible and remember it.

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• If you want to survive for a long time and make profits through investment, you need to be familiar with numbers and be comfortable with dealing with numbers. Some people say that true alpha comes not from obvious numbers that everyone can see, but from something that others can't judge. That may be true for really talented masters, but it's something that most ordinary investors can't imitate.And if you really understand it perfectly, you can even quantify your dreams and imaginations in your head to some extent. People's memories tend to be lost or distorted over time. In this case, there is nothing else but numbers that don't change over time to protect you.Those who have a poor memory or are not good with numbers should quantify key points even more so that they are always in their minds.