There's about one hour. That's it. The one hour of awakeness. Before it, you were asleep. After it, you'll be at work in a state of semi-conscious depression. So that's all you've got: 60 minutes to caffeine up, eat, and feel like you're you. Use it wisely.
When the sun rose on the first day of humanity, the first son asked the first dad, "what's this time called, papa?" And the first dad said, "morning." The first son considered this for a moment and then asked, "Why is it called that?" to which the first dad replied "Jeez, I don't know. Do you have to ask all these stupid questions when I'm so tired?"