Measure off the area of grass you want to kill, using the tape measure. Place lawn stakes at each corner of the area.
Mow the area of grass between the stakes with the lowest setting on your mower for a close cut.
Spray the entire area with a garden hose to soak it.
Unfold a newspaper and lay the sheets over the area. Overlap the newspaper pages to cover the area thoroughly. Use more than one newspaper if necessary.
Lay a plastic tarp over the layer of newspaper to hold it down and keep light from reaching the grass. Place heavy rocks over the tarp to keep it in place. The grass will die off from lack of sunlight.
Lift the tarp and look at the grass every couple of days to check for dead grass.
Remove the tarp and stakes. Rake up any remaining newspaper.