Alcohol may make you feel tired, but, counterintuitively, it won't lead to a good night's sleep. According to a new study, drunk sleep is of a much lower quality than sober sleep. Even if you fall asleep more easily after drinking, you won't stay that way--and since alcohol is a diuretic, you'll keep getting up to go to the loo. Bottom line? Insomniacs are better off asking their docs for a prescription sleep aid.