Don't accumulate highlight on highlight. When you do that, the hair becomes one solid, processed color. Don't wear blue eye shadow because you have blue eyes. Use a color that shows your blue eyes like brown or taupe. Don't match your lipstick to your dress or jacket or suit.
People try to draw attention to the face with big, clanky, flashy earrings.
Don't wear very big eyeware that obstructs the cheekbone structure. And don't wear an odd color eye frame like purple or green. Do work with your natural hair color and enhance your natural color as opposed to faking it. Look at yourself very carefully. Try to not add things unnecessarily.