Some of the steps can include raking the dead grass off of your lawn or removing the pieces that can be rolled up. Once this is done, add fertilizer followed by grass seed. After planting new grass, be sure to water daily. You can also help fertilizer take hold with core aeration, a process where you make small holes in your sod to help the nutrients reach the grass roots.
Grass Master has a product that can act both as a curative and a preventative for grubs. Obviously, preventing the grubs in the first place is always your best bet!