Sort:  

So how many hours do you normally sleep a night? Do you also have the chance to take naps? I feel that napping really helps to be more productive :D

I guess average 9h :) . 8 simply isn't enough for full concentration. I avoid naps as I've messed up my day/night cycle a few times. I usually get sleepy after lunch, that's when I drink a tea or take a bit of a break. ^^

Yes, after lunch is the best time for napping or having coffee/tea :D