My Bad Habit

I have a bad habit. The habit is that I am a night owl.At midnight ,when my roommate is about to sleep,I always sitting in front of the computer,chattingwith my friends.Worst of all, some people stay up late for writing schoolwork,they can't help having to do this thing.but I am not. I know to keep regular hours is good for health . I feel my health condition recently get badly than before;therefore, break this bad habit is really important to me .For my own good ,I have to make up my mind to kick this bad habit