See I think it must be fairly easy for guys... you can never go wrong with a classy shirt, you can dress it up with a tie and black pants, or dress it down with some jeans and a t-shirt over the top of the shirt (I love that look - you know the one?). See for girls, it is really hard to co-ordinate like that... you need seperate tops for going out, seperate shoes...bla bla bla, too hard.