Mix peat moss and soil with water until it is damp, not drippy. It takes time and patience to do this. (Mix it in a wheel barrow so it is easier to move around the yard.)
Distribute the mix on thin, bare or damaged spots on your lawn, spread a little fertilizer on top and then add some seed.
Tap it down to set the seed and keep it from becoming a bird buffet. Water it daily.
The fresh grass should grow within 10 days and fills in your lawn to a beautiful thick golf green!