The vaccinations are generally good for long periods of time so why not get them?

Hep A, Hep B, Typhoid.

Along with your garden variety tetanus booster and a possible polio booster.

These would be available also at a county or city health department. If you are traveling for work your company may pay the bill (any amount over and above what your insurance pays).

Although technically not a vaccine, malaria prophylaxis is the one to consider whether it's worth doing or not. If you talk to Indians they will generally say not to bother. Keep talking to them and they will share their experiences with contracting malaria, however.

Upside: you won't get malaria
Downside: Doctor's appointment, expense, taking lots of pills, going crazy (Lariam)