Do not wear' casual shoes to an interview. Make sure they are clean and in good repair. Shoes are often one of the first things that employers remember about an interviewee. Excessive jewellery is never an advantage. Even if applying for a position in a jewellery store, chose instead one or two good classy pieces.
Jewellery speaks volumes with first impressions.
Pierce your ears, not your nose. At least leave the ring at home. Make sure you shower and wear deodorant, but not too much perfume or cologne. If in doubt with perfume or cologne, avoid its use all together. Check your breath.