Even now, I try to convince myself, 6 (sometimes less) hours of sleep are enough and this is not anxiety. 

It's not that I can't fall asleep if I get to bed, rather I choose not to. 

Reason for this, I work 9 hours a day only, but in the rest of the time, I am trying to learn two different thing. 
One job related, the other a passion of mine (6am to 9 learning fot job, 9-6pm job, 6-7pm break/walking/eating, 7-10pm learning for what I like, 10pm-00.00, trying to chill, but keep thinking a job/learning). 

So basically I sleep 6 hours a night. Unless new ideas about what I learn, come to mind. 

However, after a month of this lifestyle, I see I cannot concentrate as good as I used to and am making goofy mistakes. 

Anyone has any ideas on how I should just relax, keep my mind off of learning/job, during those hours? 

I feel it is like alcohool at this point. 

Sorry for the long post :)