Don't wear tinted eyeglasses indoors that make it difficult for people to make eye contact with you. Keep a copy of your self-assessment in the glove compartment of your car. If you smoke, be prepared for it to be held against you. Do not drink alcohol before an interview. Watch out for too much makeup, jewelry, and dragon nails.
Hair needs to be clean and neat.
Everyone of all levels should meet with Human Resources to avoid any misrepresentation of benefits. Do not accept a recruiter's word on insurance coverage or assume the book you have been given is the most recent. Don't keep secrets of your own past the second or third round of interviews. At an appropriate time, after mutual interest has been established, be candid about the three-week vacation you have planned in three months. Or that you might not be able to start for eight weeks.