Sleeping has always been difficult for me, for as long as I can remember. Since becoming a student, it has only became harder with late night parties and course work stress. In my first year of college I was suffering with insomnia which likes to make a come back in stressful times. Then you have the whole working in bar thing-not getting back home till 3 and sleeping until 12. You don't have your mum telling you it's "lights off" and just one more episode seems totally acceptable when you have a 9am lecture.
Let's face it, having a reasonable sleeping pattern in your twenties is tough job. But I might have the answer...