The problem with bookmarks is you're never going to have time to reread the whole thing. I make a summary and put the source as a hyperlink so that if I summarized wrong I can go read it again. Summaries are better because you can organize summaries and have everything you know about enums together in a few pages, rather than 20 bookmarks.
You don't need to re-read all of your bookmarks. They're basically a hash table keyed by some concept or some problem that you either list elsewhere or remember in your head, that you can quickly use to pull up the full detail content for the given key. Much like the actual physical bookmarks that are just quick jump references to content you already know the summary of.
Don't use bookmarks as a 'I might come back and read this later'. Use them as 'I will need this later'.
I fully agree with this sentiment. It is very important to not have the feeling that you need to revisit all your bookmarks. In that case, you will eventually feel overwhelmed and a bookmarks library will do more harm than good.
