Fall is the best time to install lawn from sod, because grass roots have an easier time getting established during cool weather. Pick up sod (or have it delivered) in the morning and start installation right away to complete planting the same day.
Step 1: Unroll sod strips over well-moistened, amended soil, pressing edges together where they meet. Use a sharp knife to trim strips to fit sod around paving or irregular areas.
Step 2: Roll the newly laid sod with a roller half-filled with water to smooth out any uneven areas and to press the roots firmly into the soil.