Regarding keeping track of links, I am using a self-hosted Semantic Scuttle to save (publicly, privately and shared with other users), tag and annotate links. The 2favorite extension of Firefix lets you save a link directly from the page whose URL you want to save. Yo can also save links directly from your feed reader although it is not «frictionless».

I have an RSS feed of al my saved links and also RSS feeds for specific tags. With this, I established an «RSS to Twitter» task on ifttt.com so that everything I save publicly gets posted automatically on Twitter (the only thing I don’t like about this is the bitly links that make links intransparent but I accept it for the sake of saving time).

It is not perfect, I would like something much more integrated in a feed reader, but it’s still a personal knowledge management solution that helps me a lot.