Despite what some people have said on this thread, I'd say party hard, work hard, get yourself out there (making friends all the time), and really get involved in Uni via extra curricular activities etc. Don't waste your time sticking to one group of people as well. I finished Uni 2 years ago, and one thing my friends always say to me is that they wish they got involved more and made friends outside of their comfort zone. Luckily for me, I did all of that and don't look back at uni with any regrets.