A sprinkler system does the best job at watering lawns. Add a rain sensor to shut off the system when it rains. Remember, 1 inch per week is enough for most lawns. Water shrubs, and garden beds separately. Soaker hoses and drip systems are the most efficient method. Dig a few inches around plants and only water when the top 2 or 3 inches are dry. Make sure that water reaches the root zone.