In the past I would try to not overwork, now I think it's a good thing, if you want to. If you want to overwork for a week, what's wrong with it? Just take it easy next week. I think sometimes we can pay too much attention to the clock. We don't have to work 9-5 everyday, every week. Let's work 9-9 for 6 days this week and then 10-2 1 day next week. Go with the flow dude.