I haven't really done all nighters since college. But I certainly learned one critical point. During a normal day, you might eat three meals over ~11 hours (8

I haven't really done all nighters since college. But I certainly learned one critical point. During a normal day, you might eat three meals over ~11 hours (8am, noon, 7pm). If you stay right up, that will be 12 hours with no eating. The drain of skipped sleep and skipped food together are much worse than sleep alone. If you're going to stay up for ~50 instead of ~16 hours straight, you need more meals in there to keep your energy up. It's still horrible, but eating another meal or two in there will help a lot.