I've definitely felt that as a human being I was inefficient, inactive, and not optimizing the world around me. Whatever the situation is, I always have an ideal construction of that situation in the back of my mind at all times; my mind is aware and creates aggravation if I'm not striving towards building said construction. I think this mindset is quietly motivating, but when you're entrenched in lethargy or inactivity, it can result in a lack of personal well-being.
So, yes I've been where you are. The key is to give yourself some varied, meaningful routine. Connect to something--sometimes it is preferable that that something not be the internet. What it took for me to get out of a very real slump I was in was to experience failure. We all, especially perfection-minded INTJs at times, need to experience rock bottom to be able to set our sights ever higher.