Whether you're shelling out for rent or paying off a hefty mortgage, the cost of living doesn't come cheap. And that's not even factoring in all the other monthly bills you're covering just to keep the lights on and the heat humming.

The average American household spends about $2,200 a year on energy bills alone. Meanwhile, the cost of running water spiked by 41 percent in recent years, resulting in annual bills as high as $600 or more. Even if you cut off your cable TV (which can run you between $120-$240 a month), and choose the absolute slowest, most excruciating WiFi plan, you can't exactly live without light, heat or running water.

One cost-cutting solution is to invest a fortune in solar panels; another is to live off the grid. And then, there's the third option: buying a few low-cost household products that will significantly cut down your utilities and other household bills. It's true—there is a slew of everyday items that are simple to use and built with your budget in mind. Here are seven must-haves if you want to start saving ASAP.

Draft Stopper ($9.99, Bed, Bath and Beyond)

Behold, the $10 solution to the sky-high cost of warming your house in the winter. Seal off cold air that seeps in from door-cracks and windowsills with this simple sand-filled wedge, and discover how much cozier your home can be without ever turning up the thermostat.

Water Filtration System ($19.99, Home Depot)

A water filtration system filters fresh, clean water into your home, reducing the need for bottled water (good for the environment, good for your grocery budget.) It also cuts down on sediment and rust, extending the life of your pipes—and cutting down on pricey plumbing emergencies.

Energy-Saving Power Strip ($22.97, Amazon)

Surge protectors are essential if you have more than two electrical appliances in your home, and, hey, we know you do. We also assume you don't unplug your lamps and laptops every time they're not in use. That's where those hidden fees add up unless you have one of these power strips specifically designed to reduce standby idle energy use. Spend around $20, save a fortune in the long run.

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Energy-Efficient Bulbs ($15.48, Lowes)

If you have to make one change to reduce your energy bill, switch out your light-bulbs. Energy star-approved bulbs use up to 80 percent less energy than regular bulbs. According to the US Department of Energy, swapping out your conventional bulbs for LEDs, CFLs or Halogen Incandescents can save you upwards of $75 on your annual energy bill. Plus, these babies last longer—which means you spend less time and money replacing them.

Water-Efficient Showerhead ($11, Amazon)

If you want to cut down on your water usage, consider switching to a more efficient showerhead, which reduces water usage by up to five gallons a minute without skimping on the water pressure. So go ahead and take nice, long guilt-free shower without sweating about your next bill. Look for a showerhead with the EPA-approved Water Sense label, and you might even qualify for rebates and vouchers in your area.

Air Purifying Plant ($19, The Sill)

If you want to reduce the number of allergens, pet dander, and germs that float through your home daily, you could spend anywhere from $200 to $600 on a clunky air purifier that also runs up your electricity bill. Or, better yet, you could spend significantly less on a gorgeous houseplant. "I am a fan of attempting to get an indoor clean air boost with various NASA-studied plants that have been found to potentially scrub and purify indoor air of common pollutants," Dr. Clifford Bassett, founder and medical director of Allergy and Asthma Care of New York, tells Today.com. ZZ plants, Peace Lily and English Ivy are all durable, year-round plants that naturally cleanse your home of toxins the old-fashioned way and cost a fraction of the man-made versions.

Space Heater ($20.10, Home Depot)

The more square footage you have, the costlier it is to heat your home. But you don't need to crank up the thermostat and heat every room in the house if you're only hunkering down in one area. In fact, you could save a bundle by throwing down a twenty for a portable space heater. Bring it with you from room to room and warm up without running up your heating bill on empty rooms in your home.

The next time you're feeling like your household bills are out of control, consider making a few small changes and investing in everyday items that will save you bundles in the long run.