I know my productivity plummets passed 7-8 hours of work. Many times I would say it becomes negative, I.e. I make a lot of sigbificant mistakes and/or break som

I know my productivity plummets passed 7-8 hours of work. Many times I would say it becomes negative, I.e. I make a lot of sigbificant mistakes and/or break something. More work is rarely an actual solution.