Depends on your school.
Unlike OConnorScribe, my school offers good coverage through Aetna that takes care of everything except for dental and vision.
Of course as a myopic with bad teeth I find myself falling in the rather large gap left..... but, healthwise I am covered quite well by my school.
Ditto to what PaleForce said... Look into dental schools. My university had a dental school, and though the student health plan didn't technically cover dental, any university student could get two free cleanings a year at the dental school. (You had to pay the dental school for any work other than cleanings, but it was a significantly reduced cost -- basically the cost of the anesthetic and the material to fill your cavity or whatever.)
So, if your university has a dental school, ask about free or reduced cost dental care. Or, if your university doesn't, look for nearby dental schools or dental hygienist training programs. For basic care, they do just fine, and they're typically free or cheap!
OConnorScribe, I have to tell you that your student health plan sounds horrible. I think I could have had better as an undergrad (though I was on my parents' insurance at the time -- those were the days!).
My student health plan during law school wasn't fantastic, but it was quite respectable. Free healthcare at the university clinic (though sometimes this was inconvenient). It was a PPO, no referral required. No deductible, and 20% or 30% copays on everything in network depending on the service. We did get prescription drug coverage. Most name-brand drugs were $30 or $40 a month. Not fantastic, but certainly nothing to scoff at either. Plus, if you can take generics, Wal-Mart, Target and I think a few chain pharmacies now will all fill many generics for $4 a month. (Wal-Mart started it and now other places have followed suit.)
Out of curiosity, I wondered how many drugs Wal-Mart sells at $4 a month. So I went to their website and downloaded the four-page PDF. The list is quite impressive and includes everything from albuterol (asthma) to Metformin (diabetes). Even tamoxifen (breast cancer). I don't usually praise Wal-Mart, but wow.