I’ve never really given this much thought, but pairing your jewelry with your neckline certainly makes a difference! Your necklace choice should compliment your outfit; the neckline of your shirt or dress being the most important thing to consider.
Shoes: if your legs are very long and thin, avoid the very thin and high heeled shoes, to minimize this effect. Avoid also the thick models with tight bottomed trousers and those with a very large ankle strap. After all, any shoe is allowed