People who tend to put things off are more likely to develop insomnia -- a sleep disorder characterised by difficulty in falling or staying asleep says a study. The researchers said the link between procrastination and trouble falling asleep seemed to be explained by people worrying about things that they wanted to get done before going to bed Live Science reported. At bedtime people who procrastinate are ruminating about the things they need to do and haven't done and that makes it difficult for them to go to sleep study author Ilana Hairston from Academic College of Tel Aviv in