For years, a water-saving tip has been floating around the internet, suggesting that you put a brick into the water tank of your toilet. The idea is that the brick displaces water and turns a water-guzzling toilet into a more efficient one. But the reality is that while you do save half a gallon of water per flush using this method, it can ruin your plumbing. Bricks will disintegrate over time, and those particles and chunks will clog pipes. If you want to get the same effect without hurting your plumbing, try filling a plastic tub (like for margarine) with water and placing it inside. It'll do the job without disintegrating.

Using a dishwasher is one of the most water- and energy-efficient (and easy!) ways to get your dishes, utensils and cups sparkling clean. But there's a good reason not to pre-rinse your dishes: In addition to water waste, modern dishwashing machines are designed to work harder when they detect grease, grime and food particles. If the bottom rack is too clean, your machine will assume its job is done and not wash your dirty top rack dishes properly. Plus, modern-day dishwashing detergent is activated by grease; it won't work properly if your plates are too clean.

If you have time to give to a worthy cause and want to find the right charity that could use your skills and time, check out volunteermatch.org. It's helped millions of people find places to volunteer by matching them with organizations that can use their skills to create real impact. Search opportunities in your city and scroll through specific listings based on date and charity type, and learn what the specific volunteer program requires from you.