Pull all weeds from the bare areas, as they will compete with the grass roots for water and nutrients.
Loosen the soil in the bare areas, using a shovel. Remove the top layer of dirt so that the soil level in the areas to be replanted is 1 inch below the sprinkler heads and sidewalks.
Soak the bare ground where you will be replanting the sod. Wet soil will encourage the grass roots to grow downward.
Water the grassy area where you will be cutting the sod, but do not soak it. Moist soil is easier to dig through than dry soil.
Push the spade straight down into the soil and cut through the grass roots. Repeat this until you have dug a straight line 1 to 2 feet wide and as long as the section you need to replant.
Dig down 2 to 4 inches until you are under the grass roots, starting at the edge of the sod.
Dig through the soil under the roots, using a hacking motion. Continue until you have finished separating the first piece of sod from the soil.
Lift the cut sod and put it in the wheelbarrow upside down to keep the soil intact.
Replant the sod on the bare areas of your lawn.