"800 articles I have yet to read...Currently my instapaper account has some 800 articles I have yet to read. Kindle has about 10 books I want to read...pinboard account has about 100 unread article"
The following is just my opinion and I don't mean to be antagonistic. However, IMHO, your issue is that you think that being aware of topics is equivalent to truly understanding those topics. If you were really interested in those 100 unread pinboard articles, you would have read them - you seem to like the idea of knowing about the topics of the articles more than actually understanding the underlying concepts contained in the articles.
Stop trying to "be smart". If you're interested in an article - read it. Right now - try to understand it. If you read it and don't get it, find a writeup on the same topic written by a different person and read that. Continue this until you finally "get it". If you can't take 5-30 minutes out of your day to read something, you're likely not that interested in the topic. Your entire post screams that you don't know what you want to know nor how to manage your time. If you're serious about learning, start learning - and that means not adding another thing to any list until you have crossed off everything of your existing list. Instead of adding things to lists, make an effort to try to check things off of your list that already exists.
At the end of the day, life is all about choices - you can choose to continue to add things to your "to-do" list OR you can choose to start completing the existing tasks on your list.