Preparing for surgery is an important step in the top surgery process. Among other instructions, you'll need to maintain a balanced diet and drink lots of water. You should also stop smoking or using any nicotine products at least 3 weeks prior to surgery and eliminate alcohol at least one week before. Also, don't eat or drink anything after midnight the night before your surgery. Finally, for most surgeons, there's no need to shave your chest before top surgery, even if it's very hairy.