You said something awhile back about how Judaic law says that if you need to do something for your health, even if it breaks an important law like the Sabbath, you're not just allowed to do it, you're required to do it.

Well, I hate to be the one to break it to you, but you need sleep. You need down-time. You need relaxation and fun. And it's not just you--it's all of us. We can't function without these things, because it confuses our sympathetic nervous system if we don't.

When you see an instruction like "...and no one's leaving until it's done!" you should remember that it's only intended to motivate the people who won't do jack shit unless you hold a gun to their heads. Figure out how long you can work on one physically demanding thing before pooping out (might vary by circumstance, but at least you'll have a rough idea) and then work for exactly that long. Then stop. If this makes you uncomfortable, go to the person who gave the instruction and say "I can only do this for four hours today." Chances are, they'll say "Oh, okay". Especially if they're not paying you. :)

You have to be good to yourself. Nobody else can do it for you. *hugs*