To match white gold earrings with necklaces and other jewelry effectively, consider the occasion and your outfit's neckline. Match the metal type of your earrings and necklaces for a consistent look. Coordinate gemstone colors in your earrings and necklace for a unified appearance. Balance the size and scale of your jewelry; statement earrings pair well with simpler necklaces. Pay attention to texture and shape – textured earrings can complement similarly textured necklaces. Always consider your personal style when creating your jewelry combinations, and feel free to experiment to find what suits you best.