- Do you often stay up late?
 - Did you stay up late when you were a kid?
 - What do you do when you stay up late?
 - What does it feel like the next morning if you stay up late?
 - Do you prefer to go to bed late, or early?
 - Have you ever stayed up late?
 - What did you do?
 - How did you feel the next day?
 - (Possibly) Did you sleep late the next day?
 - (Similar to above) Do you ever stay up late?
 - What do you do when you stay up late?
 - Would you like to sleep late every day?
 - Why do you think many young people like to stay up late?
 - Do you think children should stay up late?
 - When you were a child, did your parents (ever) let you stay up late?