What course/major are you doing?
dfosterf is absolutely right. Accountability is an important skill one must learn.
One of the biggest pitfalls that I find with many people is an inability to complete work on time. Do not be the type of person to be staying up all night before an assignment is due trying to form some semblance of an answer. Do it and do it early.
Finally, one oft-neglected skill that is essential for university and life in general is critical thinking/analysis. You must always critically analyse what you've been learning. This is not to say you must criticise what you're learning; rather you should be asking yourself 'why am I learning this?', 'if
a is true, then what of
b', and try to understand the fundamental message (or first principles) of any issue at hand.
In High School, you are told that gravity = 9.81 m/s (or whatever archaic US Imperial unit you happen to be taught :P). These are (for the most part) indisputable data or empirical basics and you take them as given as fact. In university you are told that electrons orbit following s-, p-, d- and f- shell orbitals, for example. But this begs the question, why? Why do we use such a model? We find that it is the result of Heisenberg's uncertainty principle, Bohr's atom model and probability distributions. But it is still a function that we conceive to explain electron locations, and is not a panacea with 100% confidence. Although this example is rather rudimentary, by thinking through problems it allows you to gain true insight into whatever degree you are learning. I never really noticed critical thinking until I was introduced to standard engineering codes and theory - I began to ask myself why such formulas existed and what purpose they served, how they related between empirical data and theoretical modelling. I think of how our understanding of engineering design has changed over the past 100 years and how it will change in the next 100 years - and how I can apply my knowledge to capitalise on concepts that are still in the deep recesses of our dreams.
As for general university life, it'll be fun and frustrating. There'll be times when you're having the best time of your life and others when you're stuck in a rut. But you'll learn from it.
In a sense it's easier in Australia because most people tend to stay in their home State for the most part, so living on campus is not something I can provide any assistance with.
Honestly though, I found the transition exceedingly easy and I love the additional freedoms of college/university. And as great as the experience is, being in my 5th year, some of that fun is lost on me.
Sorry, that's probably a bit more longwinded than you'd want.