Somewhat tangential, but can't help sharing: It's counter-intuitive, but you should feel good ordering things with same-day delivery, even if you don't need it and it "feels" wasteful. Energy-intensity of delivery basically boils down to "did it go on an airplane?". If so, it has a ton of emissions associated with it. If not, it doesn't. And (of course) the less distance the item has to travel, the less emissions. If it can be delivered same-day, then it's not going on an airplane, and it's not traveling very far.