Tip #1 - Lawn Care:
Change your mowing height to match the time of year. For example spring and eary fall grass should remain 2 to 3 inches off the ground. You can allow it to grow higher in the summer and lower that 2" in the winter.
Tip #2 - Watering:
Make sure your lawn is not over watered. Most grass types should recieve between 1 - 1.5" of water per week. Most grasses tend to handle dry spells well and bounces back when watered after a dry spell.