If you live in a city with Amazon Prime Now, but haven’t yet tried it, you can save $10 on your first order with promo code 10PRIMENOW.
All you have to do is build a cart with at least $20 worth of eligible goods from Amazon, and enter that code at checkout to get the deal. I’ve literally built Prime Now orders in the past that consisted of nothing but ice cream and junk food, but they recently added a selection of healthier stuff from Whole Foods as well, so you should have no trouble taking advantage.
Just remember that this deal is only available in cities with Prime Now service, and only first time Prime Now customers are eligible.