A lot of people just see notes grow, but make no progress. The key is to create something with the notes. （费曼学习法）
Ask yourself what are your purpose for taking notes?
Don't think taking notes as the end goal, taking note is actually just the beginning of the real work. The real work is to create stuff with these notes.
最重要的不是去收集笔记，而是去连接笔记然后发展新的想法。note is about connecting, not collecting and classifying。