I have dark circles that are pretty much permanent. I'm averaging 5-6 hours a night....and it isn't because I have lots of homework. I keep staying up late to read manga/mess around online. My mom keeps saying, "You still have 3 years of high school and college left. Learn to time manage or you'll die of sleep deprivation." Sorry Mom! I already did! Damn poetry project....0 hours of sleep that night....zzzzz