How to summarize and sort out academic literature?

I think the main purpose of sorting out documents is to find the needed information quickly under any conditions. Any useful software is not as good as reading documents in batches. My idea is: light sorting, heavy search. Light classification means not classifying documents, or simply classifying documents. Re-searching means using different search tools to quickly find the documents I need. In my opinion, if the search technology is very powerful now, if you use notes and other means to organize it, it will easily lead to rules and regulations, and paying attention to a document for too long is not conducive to improving efficiency. In my daily use, I seldom use other software to record the documents I have read except to mark them directly on the document PDF. Because besides the literature itself, what other carrier can be recorded directly and conveniently?

So the problem of organizing documents becomes: how to find the PDF document of my notes quickly. To this end, I established a document sorting scheme based on document PDF cloud synchronization, supplemented by a large number of search tools. In fact, people who have done scientific research will find that it is very rare to really read a document from beginning to end. In most cases, what we need is actually reading the literature in batches and rounds, because at different stages of a project, even the same literature has different concerns. If all the documents are read at the same time and in the same depth at the beginning of the project, it is bound to waste a lot of time and do useless work.

I have also gone through the detour of document arrangement. Every time I read a document, I will create an entry on Onenote to fill in the blanks according to the document title, innovation, experimental process and personal feelings. But after reading more literature, I think this method is inefficient and used less and less. My main method now is to establish an electronic document index based on Mendeley, with cloud synchronization of PDF documents as the main storage means, and quickly find the information I want through various search means such as Everything, Google Academic, desktop search software and Onenote notes.