You know what I learnt after my first year, is independence and university is all about you. You are in control of your own self, you make your own choices also most importantly you will deal with the consequences from your choices.Its totally up to you if you want to attend lectures or tutorials, if you do, you will actually learn something which can be beneficial for you but if you don't attend lectures or tutors and you just play fuck around the campus you wont learn anything.
In HS, most of the time you will be chased up by your teachers in terms of homework and assignments. But in university you will be notified about the assignment in the first week and then it would be up to you to figure out what the assignment is and when is the due date. Once again is up to you when you will do the assignment but if you do it on the last minute you will procrastinate which may have the chance to impact the quality of work. One tip I an give you is that lets say there is an essay of ~2000 words all you have to do is to just break up the work load dedicate a certain amount of words on one day and so on.
Another tip I can give you is that if you are able to find out the dates of the various assignment are due, create an alert on your phone or laptop which then can remind you thus not making you to forget it.
All best of the 1st years of 2016