When sowing seed for a new lawn or repatching a brown area with new grass, remember this one simple rule: Not all grass seed is the same. First, take note of the type of climate you live in: Do you get lots of rain or very little to no rain? Does your lawn have lots of sunlight, or is it shady for most of the day? Purchase the right type of grass seed that will thrive in the type of environment you're trying to grow. And in the fall, make a habit of overseeding your lawn by spreading grass seeds on top of the lawn. This will ensure a thicker lawn that actually helps crowd out weeds, which then removes any need for chemical herbicides in the spring.