Computer Science Uni course. What to study?

I might do a course in computer science at the local university. Just wondering what should I study at home to prepare myself?
My brother took the course but doesnt think I have a chance in getting in or finishing. So hes not giving me any tips. He told me ages ago they had him learning programming languages that are no longer in use as well as the current ones. Should I start with math? Learning a programming language or what? :/

study money.  let's face it, college is a waste of time.  shit, right now, you could be wanking it to a perverted Japanese man's sexArt. Instead, you're talking about college, fucking bitch shit.

Fuck your compiler, go get some damn good college pussy.  CS is BS.  Instead, shit out some PHP garbage for a couple of years and fall ass backwards into some .NET job.  Make damn good cash and lick office bitch pussy as a midafternoon ritual.  Read a book once in a while and you can BS your way into a gig.  Promise the moon, deliver whatever work, and take the money & run.  The industry has talent shortages so you better ride it out now before the ^FACEBOOK money runs out.