Depending on your other health conditions and medications, your surgeon may want to evaluate certain physiologic or lab values. Depending on your age and family history, a preoperative mammogram may be in order. Your physician may need to adjust or stop your dosing of certain medications such as aspirin, blood thinners, herbal supplements, etc. In short, you should be in the healthiest condition possible on the day of the surgery. This includes regular exercise in moderation, and avoidance of tobacco and alcohol as well.
The best way to prepare for surgery is to educate yourself about the procedure you are planning to undergo, and the risks and benefits associated with it. In doing this, you should not only know what the typical course of recovery will be like, but also what problems to look out for. You should understand all of the new medications your physician recommends for you, and how to care for your bandages and wounds. Make sure you have all of your questions answered prior to surgery. Finally, make sure you don't eat or drink anything after midnight on the day of your surgery, and that you know which medications, if any you should take the morning of surgery. You will need a friend or family member to bring you to, and to help you to return from, the operating facility.