hey stud, i agree with you completely. but having come out from berkeley, i would say that 3.3 is definitely pretty good! (mind if i ask about your major? i am MCB-CDB.
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anyhow... on top of second'ing what stud said about the numbers, i would advise the premed to take manageable amount of courseload every semester, and if things don't work out with one class, don't be afraid to call it quits and take it again the next semester.
during my second semester, i actually took ochem, physics, calc, and english all together, and that was a BAD idea. i spent 10+ hours doing english outside that class every week. at first, i was doing great in both physics and calc, until i realized that i really needed to spend more time studying for ochem. then i shifted pretty much all of my attention to ochem, and ended up getting low grades in all my science courses.
that semester alone ruined my GPA, bringing it down by 0.6 point. i spent the rest of my college years trying to save that, and was only able to pull it up by a little bit more than 0.15 or so.
other than that... i'd say, go out and have more fun when there's the time! most premeds work too hard and forget to take breaks. i think having some good fun from time to time really does help one to focus more on the study when the exams come around!
learned those lessons the hard way...