http://www.cdc.gov/nip/recs/adult-schedule.htm

Vaccines for adults include
  Tetanus-Diphtheria Vaccine (all adults, every 10 years)
  Influenza (Flu) Vaccine (adults 50 and older)
  Pneumococcal Vaccine (adults 65 and older)
  Hepatitis B Vaccine (adults at risk)
  Measles-Mumps-Rubella (MMR) Vaccine (susceptible adults)
  Varicella (chickenpox) Vaccine (susceptible adults)
  Vaccines for travelers (see CDC travel web site for specifics)