The water meter should be read at 10-20 minute intervals. If it continues to run, a leak probably exists. Insulate all hot water pipes to reduce delays in waiting for the water to run hot. Be sure the water heater thermostat is not set too high. Use a moisture meter to determine when house plants need water.
More plants die from overwatering than from being dry.
Water only when needed. Look at the grass, feel the soil, or use a soil moisture meter to determine when to water. Do not over-water. Soil can absorb only so much water, and the rest simply runs off. One and a half inches applied once a week will keep most Texas grasses alive and healthy.