You know that freezing cold water that goes down the drain that you run so it is warm/hot before you step into the shower?
Step 1: Collecting
Place a pail under the faucet to catch all of the cold water when preparing for your shower.
Step 2: Water Indoor and Outdoor Plants
Now you have saved the water to water indoor and outdoor plants without wasting more money with running water.
You can collect outside rain to water with large drums as well to water outdoor plants without rising hydro costs!