The tactical application of a credit card can save you money, earn cash back on purchases and knock off a big chunk of your Prime Day purchases. If you're a Prime member and qualify for Amazon's Prime Visa, you can start off with a $100 gift card upon approval. You'll also get 5% cash back on items you order via Amazon's website, Whole Foods and Amazon Fresh and 2% back at many other vendors.

If that sounds appealing, be sure to check out CNET's look at all the details about the Prime Visa.