Mow every 4-7 days.
Keep your mower blade sharp.
Remove no more that 1/4 to 1/3 of the plant each time you mow.
Mow at a height of 3-3 1/2" all season long. To ensure that you are mowing at 3-3 1/2", place your mower on a level paved surface and measure form the surface to the blade. A 1,2, or 3 printed on a mower deck will not necessarily represent inches. Keeping your lawn mowed at  3 1/2 inches will promote deeper roots and reduce stress during summer.
Avoid trimming along the edges with a string trimmer or edger. This practice usually exposes soil to sunlight, drying out the soil and reducing the effectiveness of the pre-emergent that is applied with our first application of the season. This will allow for weeds to grow in those areas especially during the summer mothers. Lawn edging/trimming should be done during September or October only.