Don't pull a New Zealand; get some sleep.

Don't know if you're familiar with EcoChallenge, or if they still air it. It's an "adventure race": They start teams of about 4 people out in some remote location-- I think the year in question they were somewhere in Fiji-- and the teams race to an endpoint using survival skills, orienteering, and extreme sports-type stuff. Whatever it takes to get to that endpoint, whether it be hiking, swimming, kayaking, mountain climbing, you name it. And they're RUNNING the whole time because it's a race. It's intense to watch. This one year the two teams in first place were Australia and New Zealand, who have a fierce rivalry going. It was down to the last few days of the race, and there were a few critical decisions to be made, including whether to climb over a set of mountains or swim around them, and whether to stop to sleep or keep going. Australia decided to sleep. The New Zealand team leader was gleeful that he decided his team should forgo sleep, because he figured it would give them the extra time to really get ahead.

Anyway, it was a disastrous decision. Sleep deprivation hit very, very hard, and of course it was the team leader himself that got hit. He was hallucinating, raving, walking straight off of ledges... it was amazing and horrifying to watch. His team ended up having to carry him, which of course lost them the race.

So when I'm in a deadline crunch and I decide to take time out to sleep, I generally say I "don't want to pull a New Zealand." =)