I will not be doing classes with my friends and will be a semester behind. The following points emphasise what I have learnt. Always do the work that is set for you. Even if you don't have to hand it in, it is set for a reason. Read all the handouts you are given.
University is a great place to meet people and have a good time.
Go to the tutorials. It is the best time to ask questions and to keep yourself up to date. If you have any problems during the year, do not let them grow. See the Academic Advisor and you will be guided on what to do or who to speak to. This is what I wish I had done at the start of the year.