I was the one that recommended a chain link fence gate, but I used a long 8' pallet to level my yard before the sod was laid. It took probably 6 - 8 hours of dragging it around behind the garden tractor I had back then, but it worked great (with patience). The sod installers commented on how well prepared the yard was. It made their job easier and made the yard nice and smooth.
An easier solution would be to buy a chain harrow.
http://www.northerntool.com/shop/tools/product_200641649_200641649
Do the rough grading with the ratchet rake, then use the chain harrow to really smooth it out. You can use the chain harrow with the tines down or flip it over and use it with the tines up to get a smooth finish. The chain harrow also works well to collect all the sticks and trash, but it's somewhat of a pain to lift it so you can collect all the trash.
I saw someone use one with a boom pole once, which was a neat idea. Attach the chain harrow to the boom pole with a length of chain, and then raise the boom pole to lift the chain harrow to collect the trash or position the chain harrow where you want it.
King Kutter Boom Pole, Model# BP | Category 1 Scoops Carry Alls| Northern Tool + Equipment