If you have an Amazon Prime membership, you're in luck today. It's the second annual Amazon Prime Day, where you can get steep discounts on electronics, tablets, apparel, and more. And you'll also get that Prime perk: free shipping! If you don't have a Prime membership, today's the perfect time to sign up for a free 30-day trial. Hot tip: You can then use this promo code for $10 off your first order, along with $10 off a future order. Not interested in a Prime membership? You can look for other discounts and codes on our Amazon coupon page. But no matter how you shop, make sure you check Groupon Coupons first.