A good way to conserve water in the garden is to capture rain water from your roof in a rain barrel. During a moderate rainfall, a 25-by-40-foot roof can shed 600 gallons per hour.
All you’ll need is a capture system (roof gutters and downspouts), a storage system (large-capacity barrels) and delivery system (garden hose).
Also, use rainwater to fill water features, which calm your nerves and attract birds and butterflies. Use a recirculating pump to keep the water flowing; replace evaporation with your rain barrel supply.