Do you garden or water your landscaping frequently? If so, consider investing in a rain barrel to collect rainwater that can be used to water your garden and lawn without having to turn on the tap. Rain barrels are hooked up to your home’s gutter system; the rainwater pouring off your roof funnels straight into them. The water isn’t drinkable, but it is suitable for watering lawns and gardens, which can save you a lot over time. Learn more about rainwater harvesting.