human
What are the best ways to keep my lawn healthy?
assistant
1.  Mow your lawn regularly, cutting no more than 1/3 of the grass blade at any given time.
2.  Water your lawn deeply and evenly throughout the day.
3.  Aerate your lawn by pulling plugs out of it with a spade or aerator machine.
4.  Fertilize your lawn once or twice a year, depending on the type of grass you have.