DO dress very nicely. Women who want to blend in shouldn't dress overly formal or conservative, but should still dress elegantly.
DO wear clean and stylish shoes.
DO keep nails manicured.
DO dress more conservatively for business functions. Men should wear dark suits, shirts, and ties. Three piece suits indicate that you are an executive, and two piece suits indicate that you hold a lower position. Women should wear dresses and suits, but they should still be feminine.