Depends on your lifestyle. I have current vaccinations against Hepatitis A and B and tetanus. Hep A and tetanus are very strongly recommended. Hep B is mostly transmitted via body fluids, and I am in the high risk group as a rescue worker.
Some advise to buy antibiotics abroad as it is often cheaper than in the US and I have bought antibiotics etc without prescription. Your call.
If you have the budget for a travel doctor, by all means, visit one. Otherwise, my best advice is to do your own research, as many of the "extra" vaccinations and pre-medications carry a long list of risks with them (though often outweighing the risk of being infected), and you should be the one evaluating the risk vs benefit ratio.
A good example - I made an educated choice not to take the swine flu vaccinations (remember that scare?) as the risks outweighed the benefits for me. Out of my 50 coworkers that got the vaccine, one suffered nasty sideffects, and there are now reported cases of children suffering long-term health damage due to the vaccines (like narcolepsy). I am not anti-vaccine, as my vaccinations lists attests, but you really need to invest some time to do your own resarch on this.