I have insomnia too, and I go to work, but for people who don't have insomnia, a night without sleep is rough. I shared an office with this chick once who complained "I woke up last night!" I was like...you woke up and didn't get back to sleep? and she said, "No, I WOKE UP!" as if this was a huge issue. Apparently she woke up, rolled over, and went back to sleep. I wake up 5-6 times every night easy and it's no big deal.