Strange as it may sound, you can actually help conserve water by collecting and reusing it through a couple of different methods. Harvesting is the process of capturing rain water, which you can then use to hydrate lawns and gardens. There are a number of different types of water harvesting systems available, including those that you can install on your roof or stand-alone units that you can place in your yard. You can also create your own indoor water harvesting system: Just place a bowl in the sink underneath your hands while you're washing vegetables. Then, reuse the water that's collected in the bowl to water your houseplants.