Whenever I try to 'push' myself I always remind myself of about 8 years ago when it was 12 - 16 hours on the computer, sleep and repeat. In my mind at the time

Whenever I try to 'push' myself I always remind myself of about 8 years ago when it was 12 - 16 hours on the computer, sleep and repeat. In my mind at the time I felt like it was being productive and doing good. Reality was that it was a lot of clicking around, trying to focus was impossible and my productivity was just shot. Now I work solidly for 7 hours and that's it. If I have enough juice to be able to focus on an article or do some of my course then I'll do it but if I have to re-read the same sentence 3 times, I tap out. Tomorrow is a new day and so far my obsession with 'optimizing' every waking minute has provided me with exactly nothing so now I'm trying to switch things up to a more placid life.