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.