Opting not to own a car is one of the biggest decisions you can make to lessen your carbon footprint, save money and make an impact on the environment. But there are times when a car could be handy to run errands or take a road trip. The app Getaround is making car-sharing easy: All you do is search for cars nearby, enter your necessary license and credit card info and unlock the car of your choice. Each car comes fully insured, and you can rent it for just a few dollars for as little as one hour.

Dry cleaners use plastic bags on freshly cleaned clothes to make sure they don't get stained in transit. When you get your clothes home, don't store them in the bag. Since the bags are airtight, moisture can get trapped inside and create a breeding ground for odor and mildew. And if you reuse the bags to cover clothes, stains can oxidize, which makes them impossible to clean in the future. Instead, remove the bags and recycle them in the same recycling bins that accept plastic shopping bags.

Do you receive magazines in the mail that you don't remember subscribing to? You're not alone. Many publishers are working with online retailers to give "free" subscriptions as a reward for shopping on certain sites. But for many of us, the magazine is a waste, not a welcome gift. To avoid receiving magazines, do two things. First, always make sure to read the fine print before clicking "purchase" on websites. You can opt out of free subscriptions. Second, if you do receive a magazine, contact the publication and ask how you ended up on the list. Then you'll have the option to refuse the subscription moving forward.