For my sandy soil, I use a disc harrow, then drag a chain harrow to smooth it. I run it one direction then run perpendicular followed by chaining. On the last pass I pull the disc harrow and connect my chain harrow to the disc, this way I am doing two things in one pass. It really puts a load on the tractor, but it is fun watching the disc harrow bust and turn the soil while the chain is smoothing everything out.
Joe