What could be the harm in picking up a shell or rock when you're snorkeling in the ocean? A lot, actually. According to the Natural Resources Defense Council, "picking up a rock or shell could expose the organisms or fish eggs beneath it to predators." And with coral reefs being home to 25% of the world's fish, small shifts like this can have a seismic effect if everyone does it. Leave snorkeling near coral to expert swimmers, and stay far away if you're a novice. Don't forget to opt for "reef-safe" sunscreen when swimming in the ocean, too.

ANDREWS MCMEEL SYNDICATION

Are you someone who turns on the shower in the morning and walks away so you can return to a warm shower? You're not alone, but you're wasting a ton of water. On average, about 2.5 gallons of water goes down the drain; even more if you're not diligent about returning immediately when the water turns warm. One way to save money and water is to install the kind of thermostatic shut-off valve that is gaining popularity in states like California. Essentially, it lets cold water flow from the showerhead, then automatically shuts off when hot water starts to flow. When you hear the water turn off, you know it's ready for a hot shower.

ANDREWS MCMEEL SYNDICATION

Did you know the retail chain Best Buy makes it easy to recycle home electronics? They have long taken things like broken televisions, laptops, desktop computers, cellphones and printers to recycle free of charge. But did you know they take small appliances for recycling, too? This includes things like hair dryers, curling irons, vacuums and turntables. For an extensive list of items they accept (and many they don't), visit BestBuy.com. There's a limit of three items per day for this program.

ANDREWS MCMEEL SYNDICATION