Did you see all those white stalls when you went to orientation?
Basically during O-week those stalls are filled with various companies and the social groups at Macq.
Best thing is to go around and to sign up for social groups that interest you.
There's also some free stuff like drumstick icecreams.
If you're under 20 you can sign up for NRMA free2go which is a free NRMA roadside assistance service for those under 20.
what's good about it is you can also get a discount on your next year of membership.