And the unfortunate reality is that even though you feel like crap the next day, you still have to show up at the office, ready to give 110%.
But even though the thought of working an eight-hour day may seem impossible, it turns out that there are things you can do to get through it.
Here's how sleep researchers who talked to New York magazine's Melissa Dahl say you can structure your workday to power through the crankiness and exhaustion: