OK, my sleep cycle is ruined. Freshers week at university and many nights partying has not helped, even though it wasn't great before.

I've always had bad sleep habits, but this is the worst it's ever been. I don't get sleepy until 5am and I frequently wake up at 2pm, missing all my alarms, causing me to miss lectures.

I would like to reset my body clock ASAP, it's not good for my studies, health or gains in the gym. And once reset, I want to keep it that way.

Anyone got any real advice of how they broke out of bad sleeping habits? Or to those who have excellent habits, what is it that you do?