Here's a simple habit to get into with your garage door at home: Keep it closed. When your garage is warmer in the winter and cooler in the summer, you'll save on your overall energy costs. Since the garage is often connected to the house, cool air that blows in from outside during the winter can make its way into your home, and vice versa during the summer. So consider using the garage door to get your car inside and outside only, not as another door to and from the house.

An automatic car wash is the most water- and energy-efficient way to wash a car, and it's especially useful in the harsh winter months. When roads are treated with rock salt to deice them, the mixture of melting snow and ice with the salt can cause rust on the undercarriage of your car. After a harsh storm, visit an automatic car wash and opt for the undercarriage cleaning along with a hot wax seal. This will wash away the salty mixture and create a barrier that will protect your car from further winter damage.

Many of us choose to buy our holiday gifts online and have them delivered in lieu of going to the mall. When buying gifts online, opt for ground shipping instead of express shipping; it's a cheaper and more fuel-efficient way of delivering gifts. If you want to double the efficiency of your packages, have them sent to your place of work instead of to your home. Since delivery companies like UPS and FedEx already make stops at corporate offices, they won't have to make additional stops to infrequently visited homes. This helps cut down on fuel usage.