i think you have to push yourself to be really successful. i want to get a good job and earn a lot of money, so i need to work hard and get into a good university. i can afford to have less sleep now if it means i'll have a better chance in a future job interview. world leaders like John F. kennedy and margaret Thatcher were famous for not sleeping much. if it worked for the president of the united states and the prime minister of britain, then it can't be such a bad idea.