Be neat – Your work, workspace and your appearance should always be orderly. Being untidy, cluttered and unkept sends a message that you don't really care how you look or whether it brings down the professional image of the office.
Be discreet – Keep your voice down and your personal phone calls private and wear headphones if you're playing music at work. If you have an open-space set-up don’t have calls on speaker phone. Be a good neighbor!
Be decent – Leave your personal grooming for home. Don’t floss, clean your ears, give yourself a manicure, put on make-up or clip your nails at the office. Personal grooming should be done at home or at least in the privacy of the bathroom.