I'm surprised to not see any YAGNI voices in the comments. I set up Evernote with lots of collected papers I had read. However, I found I would rarely go back,

I'm surprised to not see any YAGNI voices in the comments. I set up Evernote with lots of collected papers I had read. However, I found I would rarely go back, and finding things within a collection of two hundred items was already not easier than just googling it. Perhaps with improved semantic search the situation may improve. I just think summarizing down to a small set of core ideas and storing them in a single small text file or document is better than keeping extensive originals or even per item notes.