Here's a favorite "Do Just One Thing" that is always worth revisiting: Use revolving doors when entering stores and office buildings. When you have the choice, go with revolving doors because they help block heat and air conditioning from escaping from the store. Using a regular door can create a vacuum effect, forcing hot air into the store during the summer months and causing the air conditioning system to work harder and less efficiently to cool the place. Choosing a revolving door is an easy and green thing you can do every day.

ANDREWS MCMEEL SYNDICATION

Did you know that the takeoff and landing are the parts of a plane trip that use up the most fuel? This is why choosing a nonstop flight is far more fuel-efficient than connecting on multiple flights to get to your destination. But choosing the right type of plane can also help reduce your carbon footprint. Airplanes like the 787 Dreamliner use 20% less fuel than their counterparts, and some airlines are also fixing older planes to be more fuel-efficient.

ANDREWS MCMEEL SYNDICATION

Does your home office or workplace have a ton of unused flash drives? Unfortunately, there's not much value in recycling flash drives because they aren't made with valuable recyclable material. But they are reusable, and they can be reformatted to help children learn. The website RecycleUSB.com has partnered with SugarLabs to produce portable educational platforms that can be run on any computer, all with the use of a USB. Your old USBs are erased and formatted with a portable learning center, which means they are being reused to help those in need. Simply fill a padded envelope with your old USB drives and send them to the address on the RecycleUSB.com website.

ANDREWS MCMEEL SYNDICATION