I've been using this for a while. What I realized about my behavior is that I don't want to miss reading anything that I think might be useful. Whether I am able to achieve that is different story. In any case, this little chrome extension helps me keep track of everything that I have opened in my browser, EVER. Which are exactly all the things that I think might be useful. I will read that PDF from 2008 someday.
PS: Of course, the flip side of this is that you don't open that many tabs. You develop a skill where you rely on your intuition to locate the one page, and exactly one page, that you think will help you most at this moment to understand a given topic. And you are going to open any other page, only when you have fully read that page, and now have a better understanding of the subject and hence can make a better search query to focus your learning. Let me know if you meet such an enlighted person. I'd like to learn under his tutelage.