One sentence: Just do what the supervisor asks you to do, which is not much.
That's about it.
I'm a work study student at the campus' Media Center. The supervisor gives me special projects (just like I'd get at Walmart) that he needs done without constantly having to make sure that I'm not screwing around. Usually these tasks are simple things like drilling holes in PC podiums to add locks, or removing hardware from old podiums, zip-tying cable bundles, or replacing batteries in remotes. Really, none of it is that tough, but I'm usually the one who gets such jobs. Other tasks include delivering copy jobs around campus, or providing tech support at presentations around campus. I do get to meet some people, too. Notably was Lisa Ling, formerly of The View, but then on to slightly more intelligent things, like National Geographic. Soledad O'Brien will be on campus later in the year, and Steve Irwin Lite (Jeff Corwin) will be on campus, I think next week. He'll at least be bringing animals with him, so it might actually be interesting.
But really, the job isn't all that difficult, and is by far the easiest job I've ever had.