Mowing the lawn is the one of the most fundamental steps for taking care of the lawn. If you are mowing the lawn yourself, and if you have the standard size of lawn, using a small push behind mower is the best for getting a good clean cut, and it also eliminates any damage by heavy mower blades tearing up the lawn.
Depending on your preference the best height to mow grass, especially Kentucky Blue Grass is between 2.5 and 3 inches. The longer the grass is the less manicured it will look, but it will look greener. If you look an extremely manicured or golf- course looking lawn then cut it shorter. Remember that it will needed to be watered more during each water cycle to maintain the same green hue. A fertilizer will also help maintain the color of the grass blades.
Go around the perimeter of the lawn twice and then pick a spot mow one direction, then turn and mow the opposite direction. The two main things to keep in mind when mowing is which ever direction you mow, mow in straight lines. Also, keep turns to a minimum. The less turns in the lawn, the more manicured it will look. It will also prevent pushing the grass into the ground as much as possible. The last thing you want is for the lawn to get used to being pushed down on a certain angle and stay that way.