Most people dress from the "waist-up". They have 30x30 Total Transformation Review the perfect oxford button-down shirt, the perfect silk tie from Saks Fifth Avenue, and the blazer is razor sharp. However, they forget to polish their shoes to a mirror shine and iron the wrinkles out of their pants! Make sure your belt and socks match the color of your shoes, i.e., black shoes, black socks, black belt. This tells your interviewer that you pay attention to detail. Many times, I have observed interviewers look at my shoes when greeting me. Make sure they are always, always polished.
Research how you can better your appearance. Small things like clean manicured nails make all the difference in the world.