Good idea/Bad idea

So on Thursday night, i was sitting at the computer and i was home with my dad and my older sister Kristin (the rest of my family was doing other stuff), and my sister comes down the stairs and asks if i wanna go to Starbucks, and naturally i had to say yes. Well the problem was that it was 9:00 at night, and i got a caffeinated drink. so i was up till like 2 in the morning (and so was kristin)! and i had to get up at 7 to go to school!