Rob Bliss (previously at Neatorama) lives in New York City, where "same day delivery" means someone will bring what you buy fairly quickly. What would be the greatest good he could use that for? He approached homeless people and asked them what they needed the most. Click, click, click, and someone was on the way to deliver what they told him.
Note: this video is NOT SPONSORED OR AFFILIATED WITH AMAZON. I'm sure this technique could be used with Postmates or whoever else too. I simply wanted to demonstrate how easy and convenient it can be to bring a person in need, what they need, and to encourage that behavior.
That said, Bliss was impressed at how the Amazon delivery guys (who are part of the gig economy, after all) were cheerful and respectful when they delivered the goods. It had to leave them with a good feeling, as well as Bliss and the people who received the warm clothing and other supplies. -via Laughing Squid