I use a vertical tab manager with a tab session manager, and if I want to "save a part of the Internet", I'll just newtab it and never exit out of the tab. I now have 2650 tabs in the tab manager (but not necessarily open, I usually have about 100 tabs open at any given time) since I started doing this back in October.
Ha. Do you think you'll ever revisit those 2.6k tabs?
Actually, I do, quite often. What's great about it is that I'm not just saving the link, I'm saving the link's context. So I can see where the link came from a couple tabs above the tab I'm looking at. It brings me right back to the state of mind and what I was researching/looking for when I found the link. I can also look below that tab and see all the links that that link evolved into. It's much more handy and not-stupid than you might initially think. People think I'm crazy, but the system's proven its use to me again and again. For instance, if I'm researching relational databases right now, I can type "relational databases" into my search box, and below the query, Firefox will show me a list of tabs I have open that contain the words "relational databases". It will give me an option to "switch tabs", and I can switch hundreds of tabs back to the link. Voila, I'm instantly at a tab which is surrounded by many other related tabs (and as I scroll up or down, slightly less related tabs, which again is useful for determining context). Having a chronologically ordered list of 2600 links is so much better than having a categorically ordered list of 2600 links because of the context it gives me. I can still pattern-match for the words in the title of the URL if I need to find it too, so searching for a category technically works. What's cool is that I sometimes have a tab open more than once, so I can potentially have more than one context for this one link, giving me more than one perspective on this one aspect of my research.