How much do you sleep at night?
yan: "You can't steal time from your sleep schedule, you can only borrow it. Eventually you have to pay it back. With interest. Yes, you have to get XYZ done by yesterday, or... or... Well, something really bad will happen. Take a minute to consider most deadlines you've had. Is the deliverable going to ship the day after the deadline? Of course not, this is just the regular monthly deliverable. By the time the shipping deliverable rolls around you'll be paying back your sleep debt, with interest. "- bram cohen