The best way to mix furniture styles is to anchor the room with one primary style covering about seventy percent of your furniture, then layer in a contrasting supporting style at about thirty percent. For instance, pair a mid-century modern sofa with a contemporary coffee table in complementary colors and materials. This balanced approach prevents clashing and creates a curated, timeless look. Focus on a cohesive color palette and repeat materials to unify the styles, ensuring you still love the space five years from now.