I don't like to lie so I always hide the truth by only revealing a part of my situation that will convince them to stop asking while keeping the part I would like to hide hidden.
Me: stayed awake the entire night, slept for five minutes, get out of room.
Parents: "Did you stay awake all night or did you just get up early?"
Me: "Don't worry, I did sleep last night."
Parents: "Oh, alright."
Me: For five minutes. Blame insomnia.