With the right surgeon, technique and good grafts, hair transplantation should be very successful in creating volume and thickness in thin, balding areas of the hair. Products like Minoxidil (Rogaine) or Finasteride (Propecia) help stimulate hair growth and can be taken before and/or after surgery. To prepare for surgery, ensure that you have at least 1-2 days off after the procedure to relax and let your body heal. Eat healthy, get plenty of rest, avoid alcohol, caffeine, smoking, and any anti-inflammatory or blood thinning medications such as aspirin, ibuprofen, Vitamin E, or Fish Oil. Shower and shampoo the day of surgery and wear a button down shirt. I hope this helps!