If you took part in Amazon’s Prime Day, here’s what you should do with all those shipping boxes you have lying around. Fill them up with unwanted clothes, household items, and other goods you no longer need. Then, log onto GiveBackBox.com, enter your zip code and email address to generate a shipping label with a tracking number. Once you’ve done that, Amazon will arrange for the box to be picked up and shipped off for free to a local charity. The full details of Amazon’s recycling program can be found here.