As for shoes, keep away from extreme high heels, sandals and flat shoes. Keep your jewelry simple. The key is never to use anything so startling or overbearing that it detracts from the overall impression you want to make. These emphasize a woman's ability to perform on the job, rather than her femininity. Make sure you look like you are ready for the income level to which you aspire.
Body language is also important.
Straight posture says that you take pride in your appearance. Graceful hand movements contribute to your overall image of poise.