Common bathroom staging mistakes include over-accessorizing with cluttered surfaces, using overly bold or dark colors, poor lighting that creates shadows, and neglecting to fix minor repairs like grout stains or leaky faucets. Another error is leaving personal items visible which distracts buyers. Avoid these by keeping accessories minimal, choosing neutral tones, maximizing natural and warm lighting, and ensuring all fixtures and tiles are spotless and in good repair to create a clean, inviting bathroom.