yeah, i'd try and keep to a regualr routine, like don't go to bed untill 10 oclock, try and stay up, and keep active and get fresh air during the day. that way, if you wake up early in the morning, at least you're controlling your sleep more.
i just got back from uni for christmas and my sleeping patterns are so frustrating. i can't get to sleep untill usually about 4 in the morning even though i'm completely shattered, and generally wake up about 9 having had only 5 hours sleep, the days are so long! have been getting some exercise tho and it is making a difference, slowly, but surely! x