Never drink coffee at 11:30 on a weeknight. I don't care if all the cool kids are doing it. Just. Don't.
Otherwise, you might find yourself wide awake at 2 a.m., poking around the Internet in search of meaningless diversion, only to discover that you read all the good blogs that afternoon.
Also, Gnarls Barkley's "Crazy" will be running through your head nonstop. Which is kind of awesome, but you don't need to dance around your living room to the music in your head; you need to go to sleep.
This is a cautionary tale, children. Heed my words.