Another tip I might as well throw in is about friends and people you hang out in general.
From school, people used to make a small groupie of friend and stick to them throughout school. I thought it was the same at uni and I made "friends" and stuck to them throughout 1st year...which was not often enough because of my job in part, and also because I was tight enough on finances not to afford taking part in much of the stuff they do together.
Come 2nd year, those people started almost avoiding me...etc, and I guess part of it was also the fact that they considered me a bit of a failure because of my 1st year grades and didn't want me to drag back the group during common study time? Might remind you of 'legally blond' if you're old enough to have watched it
Truth is that I actually had more potential than the whole group, and that because of my circumstances back then it didn't show through grades (once again, you're not your grades). I ended up doing much better than these people in later years when taking the same modules, and although they have obviously averaged better than me for the whole degree. My grades for 3rd and 4th year were higher.
Anyways, the whole situation just really got to me in 2nd year, especially that you will need to have at least a person or two who to fall back on if not for things as simple as to ask about deadlines in case you forgot them or compare coursework answers to...
And I thought at that point that most people had already formed their "groupies" and that it was too late to join any anymore...If only I knew how wrong I was!!
In 3rd year, I decided to ditch the whole group and take different modules from everyone, and I had a chance of coming across this erasmus exchange student that was there for only a semester. We hanged out together and did lots of common study/revision. The experience brought back so much confidence in me that even after that friend left in 2nd semester, I was confident approaching people in my course I had never talked to before. Also, because I had reduced my working hours during that year, my grades improved and I had "something" to bring to other people academically which I guess made things easier.
The "groupie" from 1st year started wanting to hang out with me again end of 3rd year and in 4th year!! and they were being so clingy and trying too hard to be friends by being too nice, throwing compliments every now and again. haha
So yeah, long text again, but my point being that uni is soo different from school. The particular people I told you about (the groupie) were an exception as they still had the bitterness/high school b!tch from back in their school days. But most people in my course, like I found out later, weren't like that. So just be versatile and flexible about it, that's what uni is all about.