Business people who dress business casual should remember that they will be in contact with clients who will make first impressions. In the business arena it is much safer to be overdressed then underdressed. In determining what to wear each morning, take a minute to assess the role you will be playing that day. The level of formality depends on who you are interacting with and what your responsibilities will be. Remember when accessorizing that the black leather belt you wear with your black pants probably won't go with your white spring dress.
People notice the details.
Less is more when it comes to make-up, jewelry and perfume. You can make a statement about your style without being excessive. Hair color should be natural and neat and clean. Do not chew gum. It is noisy and looks bad.