I completely agree, I'm only really productive for 4-5hr during the day (this is when I come up with my best ideas, work or solutions) the rest of the day is sp

I completely agree, I'm only really productive for 4-5hr during the day (this is when I come up with my best ideas, work or solutions) the rest of the day is spent doing general admin stuff. If you push yourself too hard you are likely just to burn yourself out. Working too long and hard is generally counter productive (at least thats how I feel)