What are you studying?
It depends what course your doing and most importantly, what type of person you are. People say that because its true.
I didn't have to adjust much to commerce, but law required some adjusting.
I approached friends in years above to ask what they did - they all tried different things and got great marks. I tried different ways until I found one that worked for me.
I did almost all of HSC 3u (thnk u patrickJMT and KA), 2u, biology and phys off youtube. I did the same with first year commerce subjects. Law is a fucking killer holy shit, but you can get around it by not doing the traditional approach (there is no way you can do the readings while maintaining a decent life). This was again explained to me by a good mate in the year above.
The most important thing to me is probably having that group of really good mates who are all smart kents so we usually keep each other on track with things.