Make sure your shoes are nice and complement your uniform. Also, all uniform pants and tops look different and don't fit the same. Look around, so many places sell uniforms...American Eagle, Land's End, Old Navy, JC Penney, Abercrombie and Fitch.In my experience, Old Navy's tops wrinkle and they don't complement figure. I found some uniform tops at target that have a little stretchy material. You barely have to iron them ( even though I do) and they are longer and length and conform to the figure(not tight just complimentary) and they don't wrinkle by the end of they day. In general, just look around try different things and make sure you feel good about how it looks and fit on you.
And like the other poster said, make sure you have nice shoes and keep them wiped off and clean.