Your plastic surgeon should get to know YOU. The doctor-patient relationship is very intimate, and your surgeon needs to know all about your past medical history, your home life, exercise schedule and your goals for surgery. There should be a good "fit" in personality between you and your surgeon. If necessary, visit a number of doctors until you feel you have found the very best fit for you.
Ask to see before and after photographs, both of the very best results, and ask for average results as well. Ask to see images of scars and make certain you understand what the healing period and expected down-time will be like.
Talk to other patients who have had the procedure you are thinking about. Your plastic surgeon can give you a list of names and phone numbers of their patients who have had surgery and who are willing to share their experiences - good, bad, and ugly - with you.
Aim to become an informed, educated and empowered patient, even before you have surgery. This will enable you to have the best possible outcome.