What happens on the day of surgery?

Double/check plan. It depends upon the nature of surgery. If done under sedation or anesthesia you should not eat or drink for at least 8 hours. The receiving staff will double check your name, the procedure to be done, and the site and mark the site. This will be repeated by the anesthesia and surgical staff in the operating room. Knowing what will occur in advance should helps relieve fear and uncertainty.
Prep and sleep. Arrive 1-2 hours early. Get antibiotics if needed. Get prepped. Read the consent carefully.