But I do have common sense and experience in the business world. For better or worse my comments are below. It is not necessary to spend any time or money on nails, other than to keep them neat and clean. Flat shoes, although often harder to find, are just as suitable as higher heels, and infinitely more preferable. A neat hairstyle that works with your hair type is wonderful.
Jewelry is an optional, personal item.
Wear panty hose or don't wear panty hose. Women's lack of role models make these choices harder than they need to be. I have successfully dressed for my goals and not my peers. Management, however, appreciated my effort and frequently told me so. I was not always in upper management, but I did always do the best within my means to dress like I was.