Pick up all of the large manageable rocks with your hands and haul them to your front driveway in a wheelbarrow. Ask your neighbors if any of them would like a few landscaping rocks. Toss the rocks that nobody wants into a garbage can.
Ask someone to help you pick up and remove the heavier rocks. Haul them to the front yard and give them away or toss them into the garbage.
Set a soil sifter on top of a wheelbarrow. Scoop up rocky soil using a shovel, and dump it onto the sifter. Slide the sifter back and forth on the sides of the wheelbarrow to allow the soil to filter through. Move the soil around on the sifter screen with a garden spade to help separate the dirt from the rocks. Give the rocks away or throw them in the garbage can.
Dump the rock-free soil back into the holes from which the larger rocks were removed.